Although her relationship with her husband is not bad, Rin is dissatisfied with the fact that he no longer satisfies her at night lately. One day, her sister-in-law Mio comes to visit. The three of them sit around the dinner table drinking, but her husband passes out from drinking too much. Due to the alcohol, the women's conversation becomes lively, and the topic turns to nighttime activities. However, when Mio hears Rin's complaints, she becomes aroused and pushes her down, exchanging a passionate kiss. Although Rin is bewildered, she is overwhelmed by the unknown pleasure and accepts the lesbian play...
