Yuki lives with her husband and her stepson Akira, but lately her husband has been so busy with work that he's hardly ever home, leaving Yuki and Akira alone together most of the time. One day, as Akira prepares to take a bath, he finds Yuki already soaking in the tub. Feeling awkward, Akira starts to turn back to his room, but Yuki notices his hesitation and senses he might want to talk. Then, without warning, Yuki begins masturbating in the bath. Akira's heart races as he hesitates, unsure what to do, yet he can't help but gaze at her. In this quiet moment, their suppressed feelings begin to surface.