After moving to a new town with her son Kazuya, Ayaka begins a fresh life. There, she befriends a man named Terahashi, and their relationship gradually grows closer. However, Terahashi is actually one of the bullies from Kazuya's past, who deliberately targeted Ayaka the moment she let her guard down. Unable to resist his aggressive advances, Ayaka repeatedly succumbs to pleasure. Unaware that she's being deceived by Terahashi, she continues to give in to him in secret, hiding it from her son. Gradually, she begins to forget her role as a mother, consumed solely by her pursuit of pleasure.