Yumi and her husband have been married for a while, recently her husband has been working overtime, coming home late and not eating dinner at home, often talking to someone on the phone. She knows her husband is having an affair but is afraid to speak out because it will destroy this family. Aoyama is a colleague working part-time with Yumi. He often invites her for drinks but because she is married, Yumi always refuses. After finding out about her husband's affair, Yumi also opens up more to Aoyama, she also wants to have a drink to ease the loneliness in her heart, so she accepts his invitation to drink together. She tells Aoyama about her husband's affair, and he, having been deceived by his girlfriend, sympathizes with her. Aoyama constantly compliments Yumi, making her feel happy and temporarily forget everything. And both end up in a hotel, Yumi tells herself this will be the only time for both, but the happiness of being loved makes Yumi unable to stop...