Ai and Chiharu are classmates and best friends who attend the same school. However, Ai has feelings for Chiharu that go beyond friendship. Unable to contain her overflowing feelings, Ai confesses her feelings to Chiharu... However, Chiharu is confused... An awkward time passes between the two, and one week later, Ai calls Chiharu. "Forget about that..." However, Chiharu gave an unexpected reply: "Let's go out together..." The two start dating and develop a relationship in secret so their classmates don't find out, but Ai has something on her mind...