The main character is a man who is called and hated by the name of mantis.
Exercise and study are inferior to those around him, and his appearance is the worst. These unpleasant qualities have always put his life at a disadvantage, and he has grown into a human being dominated by hatred, inferiority complex, and excessive sense of harm.
He used to go to school as a normal human at the last minute, but he finally exploded and blew up!
He launches a counterattack against the unfair society that has oppressed himself.
A man who has nothing to lose poisons girls to satisfy his lust!