The World Tamer Harem System: The Omniverse Will Be My Harem

It was a day like any other and Yiggrit woke up, opening his eyes to find himself in a room with simple woodwork and decorations, as there was not much to it, though the door was a sliding door, and he was on a sleeping bag like a flat floor bed.

"Birtghhhh… It's cold… So in the end, I was just thrown into a world without my questions being answered… Not like I can do anything about it." He got up from said bed and immediately began moving his body to test it.

Running around, doing push-ups, sit-ups, squats, and overall testing himself until he was eventually tired, but it did help warm him up.

"It seems my gains from the Heavenly Body were reversed... I have a normal human body." He concluded as he lay on his floor bed, looking at the ceiling.

Just as he was doing so, a floating screen popped up in front of him, carrying a message.

[Welcome To Your First World, Challenger. I am the World Tamer Harem System, your digital high-end AI assistant with various functions, and of those the main ones are: World Tamer And The Harem. These two are sub-systems interconnected to all other facets of the system.] A female mechanical voice came to his mind, as the screen appeared.

"Just like the Creator of the technique said… Ok. What more?" Yiggrit nodded as he paid attention to what it was telling him.

[The World Tamer is the title and main goal of the Challenger. To tame a world, its story must be influenced, power must be acquired in said world, accomplishments must be made, allies and other powerful bonds with prominent figures, and the more rulership power and status gained all contribute to unveiling the World Heart, The method of taming a world after making in the previously mentioned camps, which also give World Tamer or WT points, that can be used on the system store.] The system continued to explain its female voice being heard in his head.

"That works, so basically I'm free to act my way so long as I reach the top… Perfect. Go on." Yiggrit smiled happy to hear so, then urged it to keep going.

[Then there's The Harem, a sub-goal based on the challenger's path of lust before the challenge. As the name says, the challenger can and is encouraged to build a harem, as while World taming acts as the main goal, this acts as the most efficient method of growth.?The bigger the harem becomes, the higher the level cap of the challenger, and intimate interactions with members of said harem, greatly boost experience point gain.

[Finally, through intercourse with members of the harem, the challenger will gain abilities, powers, and any other traits available from them, as well as exp, and they also grow from it. The closer the relationship with the harem members the better the results. Plus interactions of this kind also provide WT points.] The system explained calmly.

"Good, not the most powerful system, but it works. Anything else?" Yiggrit asked pleased enough with the system.

[Indeed. There are a few other functions available to the system: Status screen, System Store, Quests, Harem management, Relationships, and Ruler Management.] The system responded with its feminine voice.

"Tell me more about these functions or just show me," Yiggrit ordered after he heard so.

[Status Screen]

[Name: Yiggrit Nihil

Species: Human

Age: 14 years old

Sex: Male

Bloodline: None

Physique: None

Title: None

Class: None

Job: None

Level-1(Next level 0.0%)

Rank: I

Hp: 100/100

MP: -/-

Sta: 45/45

Strength: 4

Dexterity: 6

Vitality: 9

Energy: 0

Willpower: 10

Agility: 4

Charm: 10

Luck: 1

WT points: 0

Currency: 0

Skills: Tame.Lv-1

Techniques: Heavenly Body.Stageless-Level 0

Curse: The Eternal Lover]

"Ok, explain… My skill tame, I need to see if the Heavenly Body works the same, and more important what's this curse stuff all about?!" Yiggrit found himself curious about it.

[As you wish, Challenger.]

[Tame- This skill allows the user to tame one mortal sentient target regardless of intelligence level, depending on the skill's level.

Progress: As it stands the skill can only tame small animals or other equivalent sentient beings with the taming slots available.

Level-1

Taming slot/s: 1/1]

[Heavenly Body- This technique allows the user to cultivate through any path, and so long as they can build a good foundation, they can strengthen their own body until it can cross the heavens. There are 5 Stages each having at least 3 levels.

Progress: Currently you have no mastery over this technique, a mere mortal dreaming of witnessing the heavens.

Level-0(Stageless level 0)]

[The Eternal Lover- This a curse with the effect of making it so that any woman who falls in love with you will die if you don't accept their love.]

The system clarified everything in detail, her feminine voice smoothing him as he calmly listened.

"I see… This curse will be troublesome… Why do I have it, and can I remove it?" Yiggrit asked wanting to understand more before deciding on it.

[The curse is a result of the philosophy of your master taken to the extreme, in a sense the catch to all you have gained. As for removing it, unless you become more powerful than my creator, that is but a dream.] The system responded.

"So, my master's perverted ways stick to me until the end… Then again I'm very far from a saint myself. I don't dislike it, I just hope it won't cause those around me too much pain… Well, I should focus on myself and regaining my footing with the Heavenly Body Technique, first." Yiggrit sighed as his mind thought of multiple ways in which this could get messy, before getting back on the grindset.

Then he sat with his legs crossed, then he took a deep breath, focusing on his blood flow, heart beating, breathing, and his internal side in general.

Once the focus was achieved, he quickly expanded those senses to the external side and could feel the chi in the air.

When he was learning martial arts, he learned of chi, or physical energy it was one's vitality, their lifeforce, one present in all living things.

Naturally, all around, he began gathering it into his body.

Bones, muscles, tendons, skin, hair, teeth, internal organs, and all the rest of his physical body accumulated this chi as it was directly absorbed into all his body, refining it, and making him stronger, faster, more durable, flexible, and even sharpening his senses.

It was akin to leveling up in a video game where all your physical and body stats rise when you do.

Hours went by with him focused on the process of refinement until eventually, it was over.

[Congratulations Challenger, you have gone from Heavenly Body Stageless Level 0, to Heavenly Body Stage 1 Level 1.]

[Due to your small accomplishment, you have earned 1 WT point.]

Opening his eyes, Yiggrit felt good, but he was now covered in black goo, and the smell it emanated was worse than a dead rat mixed with rotten eggs.

"Eeeerghh… I almost forgot how bad impurities smell…" Yiggrit complained, and got up, then undressed leaving his clothes behind to alleviate the smell, then he walked up to the sliding door and opened it.

The rest of the house was similar, a rather small place with a few other rooms, and no real signs of life so far.

"Wherever I am, I might live alone or something like that… System, Do I know the world I'm in?" Yiggrit asked as he continued to walk around looking into the rooms to see if he could find the bathroom.

[Yes, Challenger, You are currently in the world of Demon Slayer.] The system responded.

Just as he found the bathroom, a small room with a wooden tub, and a few buckets as well as soap.

"Demon slayer… That's not the worst world. So long as I do well with the Heavenly Body technique I should be fine… Actually, when in the timeline am I?" Yiggrit questioned as he picked up one of the buckets, and started searching the house for a source of water.

[You have 1 week before the events of the story's first episode or chapter take place.] The system replied.

At the same time, he went through the whole house, and there was his room, a living room, a kitchen, and a bathroom, aside from the hall corridor that connects these rooms, but none of them contained a source of water.

"One week… That's enough, I'll just focus on the Heavenly Body for now, and then I'll have to make a few preparations to meet Muzan. If I want to survive that's necessary." Yiggrit concluded as he exited the house naked and a bit covered in impurities, only to see that it was snowing outside, but the cold didn't bother him much anymore.

Walking outside casually naked on the snow, he looked around the wooden house, that he now knew was a part of a bigger village, which seemed to be surrounded by snow and trees.

Then he finally found what he was looking for, there was a big wooden water container connected to an outside fireplace, he immediately tried to open the valve of the container, and though the water coming out was cold, it was at least not frozen.

"Ok, time to go back in and bath, then I'll have to clean my room, or it will stay a mess." Yiggrit lifted the bucket now full of water and started making his way inside.

As soon as he turned around, he saw two women who were passing by looking at him in horror and a bit of disgust.

A much older woman with black hair under a tied cloth, a young lady around his age with black hair tied with a bow, almost looking flat, and a baby wrapped around her back with cloth.

For a few seconds, there was only silence.

"Hi! Neighbors, I apologize for this, my coal container blew up, and I was getting some water to clean up, I just didn't expect anyone to be here so early…" Yiggrit shamelessly talked like he didn't just commit indecent exposure, trying to make himself sound as natural as he could despite his obvious blush.

Just then it snapped for the older woman, and she grabbed the younger woman's hand, and they ran away together.

"Hurfgh… You have to be kidding me! I was out for a second! Why now?!" Yiggrit could only yell out his frustration as soon as he walked back inside his supposed house, and he then made his way to his bedroom and began cleaning to forget.

Later, he went out to get more water, but this time had his dirty pants on just in case, however, nobody passed by that time.

After that, washed his clothes, and then bathed.

"That was awful! I hope no weird rumors about me start surfacing, that would be bad…" He complained submerging himself into the water in the wooden tub, before coming back out and laying back. "Whatever… System… I should probably give you a name, calling you, system feels cheap. Once I have one decided I'll say… Anyway, show me the other functions you mentioned."

[As you command. The first one is the system store, where you can buy stuff related to any world you have visited while having the system. However, you are restricted to items of your rank.]

[System Store]

[Rank: I

Weapons

Armor

Accessories

Clothes

Summons

Pets

Skills

Techniques

Misc.

WT Points: 1]

"Ranks, how far does that go?" Yiggrit asked.

[There are 25 ranks in total, but you only have access to the knowledge about 3 so far, I the lowest, followed by H, then G.] The system responded.

"I know, I'll call you Karasi or Kara for short… Oh and yeah, you can continue explaining the other functions." Yiggrit nodded his head.

[Understood, the given name Karasi, and the nickname Kara have both been registered.] Karasi responded calmly.

While Yiggrit was done bathing, and went back to his room, and then sat on the floor bed.

"After this, I think I'm used to this new body, all things considered, it works fine, and it seems my looks have improved so I have nothing to complain about." He expresses as his long blue hair rested on his toned lean muscular body, quite humid as he smiled, his deep purple eyes, and looked down.

A sleeping dragon was waiting to be awoke to once more ravage, and destroy, but until then it was readily asleep.

"Yup, everything is right so far. Anyway, Kara, continue the explaining." He stretched and sat down since his clothes were still drying, and he could not find other clothes.

[Next are quests, which are missions given to the challenger under two types of situations. When requirements are met or when an important task is undertaken or set as a goal.] Karasi explained.

[Quests]

[Current Quests: None

Failed Quests: None

Completed Quests: None

Total Quests: None]

From there, the next one followed.

[Harem management is in charge of cataloging all harem members, according to the system's harem hierarchy structure in which the harem has ranks. Determined by their actions as of now, but as you grow your harem so will your authority over it.]

[Harem management]

[Harem Members: None]

It didn't stop there.

[Relationships similar to the last one, it serves to categorize all non-harem relationships.]

[Relationships]

[Relationships:

Old Master Ruio- Good(Master-Student)

Liano- Terrible(Ex-Besties)

Beast- Awkward(Peak To Surpass-Pawn In A Game)]

"So even old stuff is categorized here.…" He comments looking at the floating screen before sighing, before looking at himself again.

Then finally.

[Ruler Management, once you become the leader of a party, group, territory, faction, organization, owner of something, and so on. You can use this function to manage them, and as you level up, and rank up more possibilities will become available.] Karasi said ending her explanations for now.

[Ruler Management]

[Ownership: Small Village House(Rank I), Small Village Clothes(1 Set/Rank I)

Tamed: None

Summoned: None]

After having listened to everyone Yiggrit took some time to absorb it and reflect on it, and after a few minutes of thinking he made a decision.

"Kara, can I buy clothes that won't get dirty with my 1 WT point?" He inquired calmly sitting in his floor bed still naked.

[Yes, it is a possibility, but there is a difference between clothes that don't get dirty, clothes that self-clean, and clothes that don't get damaged at all. Of course, as you stand, you can only buy those that self-clean, but you'll still have to manually fix them if they get damaged though.] Karasi responded.

"Hmmmm… Show me the options for self-cleaning clothes I can buy." Yiggrit commanded as he let his head rest on his hand.

[As you wish.]

[System Store]

[Rank: I

Section: Clothes(Self-cleaning, only 1 WT point in cost.)

-

Small village clothes(Basic)- 1 WTP

Small village Kimono- 1 WTP

Small village housewife dress- 1 WTP

Small Village Beggar Rags- 1 WTP

...

…..

….

…..

Small village clothes(Type 1)- 1 WTP

….

….

….

WT points: 1]

The list was reasonably long, though it was mostly variations of the same stuff with not much variety, as seemed to be the limitation of his current rank.

"At that point just give me the type 1 one." Yiggrit shrugged after looking through the whole list, finding it to work best for him.

Unlike the basic village clothes which were just a shirt, jacket, and pants on the baggy side with that Eastern style, the type 1 seemed suited for combat with a tighter and more fitted look, without being too tight.

[Thank you for your purchase, Challenger. Would you like the item to be handed to you now?]

[Congratulations! You have completed your first quest.]

[Quest: Welcome Newbie.]

[Description: As a start-up newbie you have great prospects and as a reward for even taking on such a challenge, you will be awarded for your bravery, just take the first step.

Objective: Use a WT point for the first time.

Rewards: Special Newbie Ticket x1, 2 WTP]

"So, I got the easy route? Not what I expected. Use the ticket and give me the clothes." Yiggrit was all too familiar with such things from various fanfics he read before.

As requested, clothes appeared before him, neatly folded, and he began putting them on.

At the same time, another floating screen popped up.

[Using the Special Newbie ticket… You have gained… 3 out of 10 rewards.]

"3 out of 10… I guess my luck is not that high, anyway." Yiggrit narrowed his eyes feeling like it was stolen from him, but there was not much he could do, as he sat down again, now fully dressed.

[…. The prizes gained from the ticket are: Portal(Skill), Regeneration(Skill), Weapon Selection Ticket(Rank: I/Growth type)…Adjusting for world rules…. Skill Regeneration has been converted into Demon Bloodline(Nihil Varient), and Skill Portal has been converted into Blood Art: Gate. Now, would you like to use your weapon selection ticket or implement your new ability, and bloodline?]

"… That's a lot… For free?… Ok, implement the ability and the bloodline…. And you can use the ticket too. I want a scythe." Yiggrit responded a bit surprised but not hesitant.

[Implementing bloodline, and ability…]

Though he braced for the pain, Yiggrit was surprised to not feel any pain, instead, there was this warm feeling that started burning and burning until…

It went out, like a blown candle, and he was back to normal, yet different.

[Process complete. You have gained 2 WTP for your new bloodline, and the acquisition of abilities like blood arts.]

[Now using the weapon selection ticket(rank: I/Growth)… You have acquired Voracious Voulge, Demonic Living Scythe. Would you like to receive it now?] Karasi gave her last announcement of this process.

"Ok, yes… but If I'm getting all this something weird has to be going on, right?… Maybe I'm worrying too much, whatever the case, I'll be as ready, prepared, and powerful as I can be." Yiggrit is made unease by how much he got in one go, but that only made him sure that he had to grind and stay at his best.

Then the weapon appeared right before him on the ground, and it was just what could be expected from its name, and more.

It had a fairly normal handle with a fleshy metal bird-like claw at the end and on the side of the blade that made a Z-like shape with the same fleshy metal, now containing teeth on all inner sides of the Z, like a monstrous beast, with the scythe blade right on top of Z.

(AN: Weapon Image Here)

"It's interesting… Amazing! Even, but I won't be able to walk around with this thing, then again, I don't even know if I can stand in the sun anymore... So does it matter?" Yiggrit grabbed it a bit hesitantly stopping a few seconds before actually touching it.

Upon grasping the weapon, as if it heard his wishes, it hid all the flesh, and teeth, leaving only an oddly shaped metal scythe with an impractical but comparatively normal-looking weapon.

"This works… I thought I would have to cover it in rags… or something… Then again, it's probably best if I do cover it either way just in case." Yiggrit decided not wanting to take unnecessary risks.

So he got up and looked through the house, but in the end, his only option became his old clothes. After all, he wasn't going to spend WTP on this unless there was no other choice.

Once the weapon was fully wrapped in his

old clothes, he seemed satisfied and nodded to himself.

"That done… I'm curious, how much did my status screen change from before with all this? Kara, show me." Yiggrit ordered as he let the weapon rest on his shoulder.

[As you command.]

[Status Screen]

[Name: Yiggrit Nihil

Species: Human Hybrid | Sub-Species: Demonic Human

Age: 14 years old

Sex: Male

Bloodline: Demon Lineage(DS/Nihil Variant)

Physique: None

Title: None

Class: None

Job: None

Level-1(Next level 0.0%)

Rank: I -> I+

Hp: 100/100 -> 500/500

MP: -/- -> 55/55

Sta: 45/45 -> 100/100

Strength: 4 -> 20

Dexterity: 6 -> 22

Vitality: 9 -> 20

Energy: 0 -> 11

Willpower: 10 -> 11

Agility: 4 -> 15

Charm: 10 -> 11

Luck: 1 -> 2

WT points: 0 -> 4

Currency: 0

Skills: Tame.Lv-1, Regeneration.Lv-1, Flesh Control.Lv-1, Enhanced Senses.Lv-1

Techniques: Heavenly Body.Stage 1-Level 1

Abilities: Blood Art-Gate.Lv-1

Curse: The Eternal Lover]

[Demon Lineage(DS/Nihil Variant): This bloodline makes it so its user becomes a half-demon with the abilities of regeneration, flesh control, enhanced senses, and a blood art of their own. While the subject is weaker under the sunlight or against solar-fueled attacks, they won't be at any life-or-death risk from mere sun exposure.]

[Blood Art-Gate: This ability is divided into two parts, long and short-distance portals. Short-distance portals are those that can be opened anywhere in the user's perception range. Outside the user's perception range, long-distance portals can only be opened to locations the user has visited before.

Progress: At the current level, there is a limit to how many portals can be opened at the same time, and the perception range is low.

Level-1

Portal slots: 1/1]

[Voracious Voulge: A living demonic weapon linked to its user and capable of following commands as well as growing with its user.

Progress: It's still in its infancy and far from its true potential, and the more it's used, the better it grows with its user.

Rank: I(Growth Type)

Stat boosts: +5 STR, +5 DEX]

[Regeneration: This skill allows the user to regenerate their body at higher rates than normal.

Progress: At the current level, it's only a few times faster than normal.

Level- 1]

[Flesh Control: This skill lets the user control their own flesh.

Progress: At the current level, it's only enough to move flesh, and create one or two extra limbs.

Level- 1]

[Enhanced Senses: This skill gives the user senses much stronger than normal.

Progress: At the current level it's only a few times stronger than normal.

Level- 1]

"That's a lot, but I can work with it, in a singular day a lot of progress was made, so I have to make the most of it and keep it up, though I won't be able to keep jumping like this, I'll surely get strong.

"Kara, you and Voulge will help me get there. There's a lot to do, but happily, I have a whole week to get it done." Yiggrit smiled as he thought of his plan of action and his grind set.

There was no stopping him now that he had commented himself to it.