Classmates Miwako and Naomi are good friends and lesbians. The two secretly hugged each other naked, caressing each other and immersed themselves in forbidden euphoria. Miwako is a virgin, but Naomi "Bai" has a boyfriend named Ippei.
One day, Naomi, who has no period, thinks that she is pregnant and approaches Ippei, but she does not agree at all. Miwako was looking at them with jealous eyes. Ippei, Naomi's lover, whom I love, gradually seemed to be a presence that I was interested in.
A few days later, Naomi, who had her period, reconciles with Ippei in Lunlun, and Miwako is hurt because she seems to have been coldly told that she can go home.
On the way home lonely, Miwako is a straight line to the University of Tokyo? I met a prince. Kimio, who has a liking for Miwako, brings her in and starts lewd photography, and at the end of the day, she asks him to show her local part, but Miwako provokes him and leaves at the crucial point.
One night, Miwako is approached by Yoshie, who lives in an apartment complex. Invited and caressed ...