Soichi Sakuraba, an introverted high school boy, is severely bullied by the "popular" people in his class. The bullying escalates, and they rape Soichi's only trusted childhood friend, Azusa. In the depths of despair, Soichi is confronted by Asmode, an succubus. Soichi makes a contract with Asmodee, who grants him a mysterious power, and Soichi decides to inflict the same suffering on his bullies by "cuckolding" their loved ones. The lewd revenge by "NTR" begins.

(Source: Yanmaga, translated)