Mayuko Okamura, neglected by her husband, falls into a forbidden relationship with her son. She keeps telling herself, "It's all his fault! I was just... so lonely," but her growing guilt never fades. Her body has already been claimed by her son's desires, and each day she anxiously waits for her husband to leave, her underwear damp with arousal. Again today, right after bidding her husband "Have a safe day," she takes her son's cock into her mouth, sucking him deeply. A drama of forbidden pleasure and inner conflict unfolds in the quiet moments of everyday life.