Back In Time As An Ancient Demon Lord.

 Third Person's POV:

It was another ordinary day in the city that was bustling with monsters preparing for the annual festival held in Tempest.

This festival is held in remembrance of the day their great lord Rimuru Tempest stopped Feldway along with his army and defeated the evil god Iverage. Rimuru, after defeating Feldway and Iverage, tried to make them give up, but Feldway refused to stand down, ultimately leading to his death. As for Iverage, he was sealed in Rimuru's imaginary space.

Surprisingly, Ciel asked whether she could be the one to handle Iverage's issue. Rimuru, being Rimuru, allowed her to do as she pleased, and within a few months, Iverage was released from imprisonment. To his astonishment, Iverage ceased to show hostility towards anyone and would constantly try to avoid him.

When Rimuru questioned her about it, she just said, "I only let him witness his death for a few months." He then remembered that he could alter the time difference between the two worlds.

He swore to never annoy Ciel and allowed Iverage to live in tempest but was strictly observed. The monsters and humans were now coexisting, and rimuru had achieved his goal of world peace.

Rimuru: Hey Ciel, what do you think you're doing. I'm here facing my greatest archenemy, and you are busily toying around with my skills. If you love doing that so much, why don't you create a skill that will help me solve my problem. I can't be stuck here filling paperwork while you fool around.

Ciel: Master it is all your fault, and do you want me to spell it out for you?

Rimuru: It's not my fault, alright. How do you expect me to sit down here and continue doing one thing all the time. I never get a break, and anytime there is, I always end up having nothing to do anyway. Life during the tenma war was even more enjoyable than now, even though it was another problem on its own.

Ciel: Master that does not give you the excuse to play a prank on Leon and Luminous. That prank gave her depression and also made Leon to almost wage war on tempest.

Rimuru: Well, it's not my fault if they can't take a little joke. Everyone needs to chill out, you know what I mean right.

Ciel:*sigh* The master is still as childish as ever.

[ Three months ago. ]

 Rimuru's POV:

It's been a long time since I visited Guy, and it seems that he's not aware of my presence. I am currently heading to Guy's domain. I have nothing to do, so I'm just gonna head over there to annoy him a bit and talk to him a little. Maybe I'll also get to meet Velzard, and if I hit the jackpot, Leon might also be around.

That asshole has always been a pain in the neck. After the tenma war, Chloe did not spare any chance and quickly confessed her love to me.

I could have sworn I heard Ciel say something along the lines of "I'd rather eat shit than to see you lay a hand on Master you seductive trap." When I asked her about it, she just used her catchphrase. " It's just your imagination.

Well, you can't argue with Ciel, so I just ignored her. I didn't even get to say anything when this bastard barged in on us and started spouting some nonsense of how he will never let Chloe go . Due to Ciel forming up an excuse of how I needed to deal with my problems in Tempest, I had to escape, leaving them be. Now I'm ready to get my revenge. Yes, it's just revenge and not because I am so bored, hahahaha. I'm so cool, right?

Rimuru: Oi Guy, what what have you been up to.

Guy: If it isn't Rimuru. Haven't I told you not to barge in without warning?

Rimuru: Huh, don't even get me started on how you always come to my place without telling and always steal my cake before leaving.

Guy: Hahaha,don't tell me you're still mad about that. Anyway, what did you come here for.

Rimuru: (Tch, he's changing the topic, isn't he). Well, I had nothing to do, so I came to see yah. Before that is Leon around?

Guy: Ever since he found that Chloe girl, he never visited me and always denied my invitation letter.

Rimuru: Is that so? Well, I've had my share of problems with him, so why don't we get back at him. What do you think.

Guy: What do we do to him?(smirks evilly)

Rimuru: Hahaha, you catch on quickly.

**After telling him the plan**

Guy: I always knew you were cunning, but this is another level. Let's do it!

After that I quickly pulled out one of our great inventions in tempest that began to become a must get item, the smartphone out of my imaginary space to call Luminous whilst Guy waited for his turn to call Leon.

I shared it with all of Octagram in order for us to keep in touch disregarding the need for the Demon Lord's Ring. Besides, it was a much quicker and faster way to communicate.

Rimuru: Hey Luminous, it's Rimuru speaking.

Luminous: Huh, Rimuru. What is it this time?

Rimuru: I just wanted to talk to you about Chloe.

Luminous: If that is what you want me for, then I'm out.

Rimuru:Oh, come on~. Aren't you curious about what I did to Chloe the day she came to see me.

Luminous: What!! Hey Rimuru, what did you do to my Chloe you-

Rimuru: Huh. Weren't you going to cut the call on me?

Luminous: Just answer the damn question!!

Rimuru: Alright, just chill out. Geez. Well, as you already know, Chloe has always been out for me, and she kept seducing me until I reached my breaking point, and I messed up.

Luminous: What do you mean by seducing you. I hardly believe that Chloe would do that and what do you mean by breaking point, and I don't like the sound of the word "messed up." I hope it's not what I think.

Rimuru: Well, how can you blame me. I always made an effort to resist her, but all you did was to accuse me of casting an undetectable spell on you that made you see females as males.

Luminous: You damn slime!! No one, but you would dare to think of such a thing. You made my life a living hell. When I tried to sneak a peak at Chloe and Hinata during their shower time, I saw them flat chested with muscular form and that incomprehensible item on the lower part of their body.

Rimuru: Oh, you mean that. I guess you haven't seen it before, but that is the male sex organ. If you ask Gunther, I'm sure you'll get a better view of it.

Luminous: What!! You stupid prick, how dare you. That is simply going too far. Why did you do that to me? Weren't we on good terms? After hearing you say that, I almost broke. That is too much for me.

Rimuru: Hahaha. Don't worry, we are still friends, but I just wanted to play around a little bit.

Luminous: You know what, just forget it. What did you mean by reaching your breaking point and messing up?

Rimuru: It's actually self-explanatory, but since you want it hard, then why not. I... stole... her... innoce-

Luminous: Oi Rimuru, don't fuck with me alright. What are you talking about. Out of everything you've done this is too much. Are you trying to say that you touched my Chloe?

Rimuru: Well um yeah I guess. She was really asking for it and I gave it to her. It seems that she really liked it. She kept on asking for more until she passed out. That also explains why she spent longer than usual in tempest.

Luminous: Rimuru you fuck. I'll kill you just wait. I'm gonna end your fucking life motherfucker. I will-

[Rimuru cuts the call]

Rimuru: Well...that was something.

Guy:Hahahahaha!! I've never seen Luminous this mad before. Man, it has been long since I had a good laugh. But seriously, did you do that?

Rimuru: Like he'll I would! I'd not even get the chance to realise what happened because of the people around me would have already prepared a plan to prevent it, plus I don't even have a son.

[He says it whilst looking at his lower section with imaginary tears falling out like a stream]

Guy: Hahaha!! You don't have a pole! What is there, a hole?!!

Rimuru: Huh, you aren't better yourself. You have Velzard going after you but you always play the "dense as fuck" card and go after Leon who blatantly rejected you and went after Chloe but she just gives him the "onee-chan" treatment and instead chose me as her lover.

Guy: I get it,I get it! Geez. You didn't have to smack me with reality so harshly. Anyway we're done with Ruminas, what of Leon?

Rimuru: Fufufu,don't worry. We'll get to him very soon.

A/N:It is my first time writing this so please try to cope with any found mistake. I know for a fact that many have also written this type of fanfic but I assure you that mine is different and I also have different things planned ahead for this so look forward to it. See yah!😁😁