Riona is in love with Hitomi. However, because they are both girls, she hides her feelings. Hitomi's mother invites the three of them on a trip to a hot spring. When Riona sees Hitomi's underwear and naked body, she can't resist and finally makes a move on her. Hitomi is so shocked that her body stiffens and she just lets herself be done with. Even when she sleeps at night, she is thinking about Hitomi's mother and they have lesbian sex in the night. Will Riona's feelings reach Hitomi?