One day, Eriko receives a sudden visit from Sato, her son's homeroom teacher. He claims that the previous day, he witnessed her son engaging in sexual activity with him at school. If this incident becomes public, her son could be expelled immediately. Desperate to prevent this, Eriko pleads with Sato for help. Right then, Sato quietly reaches his hand onto Eriko's thigh and begins gently caressing her. The warmth of his touch and the way it seeps into her heart create a bittersweet, yet deeply seductive moment where unexpected emotions and desires collide.