It seems that her mother, Ayano, is having an affair... Kosuke, who cannot forgive his mother's infidelity as a son, decides to punish Ayano. The method is training with a meat stick. Knowing that Ayano, whom he respects as his mother, is a vulgar woman, Kousuke begins to have a distorted desire. If you attack sleep and restraint and deprivation of freedom, deep throat, strangulation and rough insertion. Ayano, who succumbs to Kosuke's meticulous training play and powerful vaginal ejaculation, is forced into a humiliating master-servant relationship with her son.