[MIAA-224] Her sister and her sister who came home from a sudden heavy rain until morning... Sachiko

The man who lives with her was thinking of getting married. She was aware of a good relationship with her sister Sachiko. One day, a sudden heavy rain caused the train to stop and her sister returned home as a refugee, and came to the cohabitation of a nearby sister. However, she is stuck at work and has become a refugee returning home, and she becomes alone with Sachiko, who becomes her sister-in-law. Sachiko, who invited her, felt that her underwear was wet all over her body, felt a woman she didn't normally feel, lost her reason, and took away her lips.