Demon Slayer: the Villain System at the Beginning, I Am No Longer a Human Being

The protagonist is a pure villain, immoral, not good at doing good things, anti-social in his infancy, and mentally abnormal. What is it like to travel through time and become a villain and a man-eating monster? Gotham's famous thinker Jack once said this: It only takes one bad day to turn a good man into a madman. Higashino Gen originally thought this was just artistic processing in comics. But they forget that art also comes from life. After experiencing a very bad day and getting lucky, Gen Higashino traveled to the world of demon slayer, but he became the half-hearted man before he turned into a demon, waiting in prison to be beheaded. Higashino, who understands his situation, has figured out a truth: there is no future for being a good person! I want to be a villain, a villain worse than anyone else! Let's start with Demon Slayer: Kimetsu no Yaiba and turn the world upside down! The timeline is too early, so it will be relatively late to enter the plot, and there will be a lot of original... This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.