Kana was drinking with a female friend at an izakaya. However, by chance, she started an argument over something trivial with Tatsuya, a student drinking next to her. As they argued over something trivial, the distance between them grew closer, and before she knew it, Kana was in a relationship with Tatsuya... Then, Tatsuya gave her a spare key to his room, saying, "So we can meet whenever we want." Kana would use the spare key to do housework in Tatsuya's room, and when she got home, she would accept Tatsuya's young and vigorous sexual desire over and over again in the limited time she had...