Newlywed Aya remarries and begins a new life with her husband and stepson. Every night, her husband demands her body, tormenting her with perverse acts that push her to the edge. Witnessing this, her stepson, Shintaro, grows increasingly curious about his father's relationship with Aya and begins to see her as a woman. One day, while Aya is bathing, his gaze lingers on her, and he starts masturbating on the spot. Seeing this, Aya gently takes hold of Shintaro's cock, signaling the beginning of a new relationship.