Six months ago, Mizuki lost her husband in a traffic accident. Worried about her, her daughter invited her to move in with her and her husband, hoping to ease her loneliness. But as the days without her husband stretched on, an uncontrollable desire began to stir within Mizuki, leading her into a routine of repeated masturbation. One day, her son-in-law discovered her in the act. Surprised yet moved, he embraced her tightly. In that moment, Mizuki opened up honestly about her feelings. She learned that her daughter was also struggling in their marriage, feeling lonely and emotionally starved. Seeking comfort in each other's pain, the two began to find solace in physical intimacy. What began as a way to heal the grief of losing a husband soon evolved into a forbidden bond, marking the start of a new, secret connection.