After a lifetime of misery and bullying, a man is miraculously transported back to his childhood. Armed with the mind of an adult, he decides to rewrite his history, using his new position to manipulate and dominate those who once tormented him—including his neighbor Sera and her mother—as he transforms his second chance into a campaign of revenge.
Having returned to his childhood, the protagonist begins his quest for revenge against the women who once oppressed him. After asserting dominance over his teasing older sister, Saki, he targets Suzuhara, a girl who bullied him for hire. Through a series of manipulative deals and sexual submission, he forces Suzuhara to reveal the shocking identity of the person who paid her to torment him: the haughty Sera.