An npc who just wants to live idling around.

The human heroine also known as Kuroka Nakiri is a human with the water element, she specialized in magic at the beginning of the game, but depending on the events, she can change to be a magic swordsman, and greatly increase her combat power, her story and trauma is justifiable to a certain extent.

All her trauma and change began when Kuroka Nakiri was in high school... one day like any other, a boy approached her at the exit declared his love, and asked her out, but as a girl who was not interested in love, she rejected him politely even though the guy made it public thinking that she would fall under social pressure.

The boy was rejected and got angry with her and started complaining to her since he was handsome along with his great origin, he thought that she would accept him and both would be the perfect couple.

and Kuroka to appease him in her kindness told the boy that she did not want to be in any relationship, the boy did not believe her so he decided to follow her to the exit.

Kuroka has an older brother named Kazuma Nakiri, he was a hero, but at that time he had lost his left arm after a failed exploration of a dungeon, and he was in intensive care.

Kuroka Nakiri loved him very much, you could say that after the death of his parents, Kazuma took charge of raising his sister.

that's why every time she finished school, she would go see him at the hospital and spend her day with him and chat with him.

The two brothers walked through the park inside the hospital, the pair of beautiful brothers caught people's attention.

she talks about school and he tells his past adventures, a great relationship of common brothers.

No one knew that Kuroka Nakiri had a brother, firstly because Kazuma didn't enter All, and secondly, Kuroka's background was clouded in the eyes of the public, they only knew that she had a good background.

And even though Kazuma was only admitted to the hospital as an A-rank hero, no one in the hospital was informed of his background, if the Nakiri family had been less exaggerated with their discretion, none of that would have happened.

When the rejected boy saw that... his jealousy turned into anger but he didn't attack immediately, Kazuma as a high-rank hero, exuded the pressure of the strong, so the boy knew that he couldn't attack head-on, he wanted revenge on the woman who rejected and humiliated him and his immediate idea was to get rid of Kazuma.

Being the son of a major guild boss, he had a visible background and used it for any dirty work, and in that case, he used it with the dean of the hospital

He waited for the hospital visit to end, he should have used the intelligence of his father's guild to at least know who he was facing, but the desire to kill his supposed love rival clouded his judgment.

He took a knife and entered Kazuma's room at midnight with confidence since a doctor pressured by the dean injected a syringe into the serum that Kazuma had next to his bed, it was a special tranquilizer that the boy stole from his father who also had assassination assignments in his guild.

The plan had 2 flaws, which are considered in the arrangement of the later plot.

The first flaw is that the boy did not take into account that although Kazuma was a wounded hero, he was an S-rank hero.

Although the tranquilizer left Kazuma in a nearly unconscious state, Kazuma's survival instinct warned him of the knife approaching his heart and he was able to avoid it by a few millimeters.

The second mistake was his stupidity of not checking if he succeeded in killing him, he should have at least checked if he was still alive, but as an idiot rookie, when the alarms sounded, he just ran away.

Although the idiot did not hit Kazuma's heart, he did hit the important artery near the heart, and adding that the knife was an S-rank artifact, which stopped the function of platelets which led to continuous blood loss.

Despite the resistance of an S-rank awakened, Kazuma ended up losing too much blood in a very short time.

When the doctors arrived due to the alarm, Kazuma had already completely lost consciousness. The blood loss and brain damage from lack of oxygen were enough to put Kazuma into a coma.

Kuroka was at school when she was informed that Kazuma was injured at the hospital.

The first thing she did was look for the culprit, and when she found him, she used the power of the wealthy Nakiri family to take him to a warehouse for fear that her grandfather would find out and do something to the boy, since one of the reasons why her family was discreet was because of her grandfather's paranoia, and his decision not to let any more family members die.

She was very kind, too kind for her good.

When Kuroka arrived at the warehouse, she didn't think about torturing the guy or hurting him. She just wanted to know why he had to hurt her beloved brother, and when she arrived she found the leader of her family, her grandfather Yuchiro Nakiri, well known as the demon of the Nakiri there.

The imposing old man stopped his granddaughter at the entrance of the warehouse and informed her that her brother had fallen into a coma with almost no chance of waking up. Upon hearing that, it is said that Kuroka broke down.

The cinematic ends with Kuroka with an empty look entering the warehouse with her grandfather.

Nobody knows what the grandfather and granddaughter talked about, the game does not describe it, some theories say that her grandfather brainwashed her, and others say that he taught his granddaughter torture.

It is only known that after leaving, Kuroka was no longer the same, she became cold and began to repulse the approach of men to her, she also stopped being discreet with her family while looking at others like an ice queen, and that boy disappeared as well.

To capture Kuroka's heart, the protagonist will have to obtain a drop from the world tree in his first year at the academy to save the brother Kazuma.

At that point, you can get a friendship from her, but the important thing is 2 months later in that same year which is to save her from the capture of some assassins who captured her on behalf of a guild leader greedy for her body.

Although the Nakiri family is powerful in business, they were not fighters, and thanks to a traitor student, they were able to capture her.

The leader of the guild [White Fang] used the guild's specialty which was assassination to capture her.

and interestingly...

the father of the rejected boy was that leader.

In the event, the protagonist is at school when he notices his friend's absence and decides to save her.

After incessant fights with the assassins, the protagonist in his 1st year and with his incredible skill and talent in combat was able to defeat the assassins and save Kuroka.

'Too out of place, in real life that would be impossible... since trained adults were surpassed by a 16-year-old child, but well, said from the perspective of the game everything is possible, so in any case here where it is now a reality it would be worrying if Kuroka loses her life...