When the wrong boy professes his love for Ayumi, she struggles to find an appropriate way to reject him.

Mamoru is in love with the girl next door, but she sees him as nothing more than a childhood friend. Meanwhile, Ayumi is head over heels for Mamoru.

Meguru refuses to join the swim team, self-conscious of the attention her breasts attract. Meanwhile, Hiroyuki realizes his love for Nao Chikura.

As Valentine's Day approaches, each character attempts to win the heart of the one they love, with varied results.

Frustrated, Mamoru, Hiroyuki, and Etsu make a plan to run away. Hearing about it, the girls get more and more worried.

The boys finally get the courage to shout out their feelings, and fate has an interesting trick up its sleeve.