The male protagonist's journey from youthful and kind-hearted to overbearing and righteous. The young man did not completely turn black because of hatred, but instead found the direction of the world because of hatred.
It is also a revenge novel, telling the story of the revenge experience of the survivors in a bloodbathed village.
It's not pure revenge, there are many other people's stories interspersed. Of course, there is no mercy at all, but the male protagonist is very ignorant and has never been exposed to anything. So basically girls have more emotions.
As the male protagonist becomes stronger and stronger, he finally becomes tough at the end.
