Ayano has raised her son Kei single-handedly. - Kei innocently asks, ``Doesn't Mom get a new boyfriend?'' - Although she says, ``It's not necessary,'' Ayano, who is still in her prime, spends her days alone comforting him. - One day, Ayano discovers a large amount of used tissues in Kei's room. - Ayano was at a loss for words at the unusual amount of sperm, but she had no way of knowing that this large amount of semen was released thinking of her mother. - Kei's distorted feelings towards his mother are on the verge of exploding...