Furyu Yuuto was born in Mihua City, where the crime rate remains high. Frequent murders and bombings made him deeply aware of the malice of the world.
In order to protect himself, he gradually developed the habit of staying at home and mastered various survival skills through self-study.
In such a crisis-ridden environment, he grew up with difficulty.
Finally, with unremitting efforts, he was admitted to Yucheng High School far away from Mihua City, and had the opportunity to escape from this "sin city".
However, can the new life really go as he wishes?
