"Ayane is being cuckolded by someone..." Ever since he accidentally came across an erotic novel about cuckolds, Masahiro has been obsessed with bad fantasies. Then, when his wife Ayane, who works as a lawyer, invites Yajima, a man she once defended, over to their house, Masahiro's secret desire gradually becomes more real. Seeing Yajima, who has been deprived of a woman, rape her and feeling pleasure, Masahiro trembles with anger and regret. But even more than that, a numbing excitement and pleasure runs through his whole body...