"But when you do evil, don't ask for retribution."
He just wanted to revenge the society. He thought so and did evil things.

Because of injustice and abandonment by the society, the fate of social animals should be like this. However, people educated in this highly civilized society can never achieve the so-called revenge. This is the last story of my life in the few days left after my resignation. To be exact, it is about the encounter between the "I" who has no future and the "she" who yearns for the future.

[From Steam]