Nanase Hina has a fear of boys from past teasing. So she's glad to be going to an all-girls boarding school and meeting her new roommate Kaede Yukino, who seems like the ideal young lady. Hina is full of admiration for Kaede, but it turns out Kaede is actually a boy – the boy that had teased her when they were little. Can they live together in the same room with this secret?