Nao, a beautiful and kind new teacher, visits the home of Manao, a student who refuses to come to school. She tries to listen to him, but Manao schemes to put him in a coma. In his daze, Manao confesses his obsessive lust, saying, "I want to pin the teacher down." His voluptuous body, which doesn't move as he wants it, is relentlessly licked, making him writhe in agony and becoming a victim of Yui semen. When Manao's father and brother return home, Nao is attacked by the clutches of the family's sex toy... Impregnated day and night, Nao's twisted masochistic nature begins to blossom...