It's been three years since she lost her husband. Her children are married and they only see each other a few times a year. Although her friends worry about her, Hidemi isn't lonely. That's because she's in a relationship with her husband's brother. She and her brother-in-law grew closer after he supported her when her husband died, and before she knew it, they were having sex. She feels guilty because he has a wife and children, but she can't stop it. However, her relationship with her brother-in-law suddenly ends. One day, a man from a bento delivery business comes to her house. She invites him into her house to try some tea, but spills it. She hurriedly wipes her crotch, but notices his large penis...