It's Nanami Takahashi's second day at her new high school and almost as soon as school starts she quickly makes some new friends in her class, like the unsociable Yuri. A girl from Asahi middle school tells her about guy named Motoharu Yano, who was very popular with the girls and happens to be in their very same class. It isn't long until Nanami develops a crush on him, herself.

The Cultural Festival draws near and all the students are hard at work preparing for the event. Meanwhile the Motoharu seems to be fairly distant with Nanami and she doesn't understand why. Then comes the day of the Cultural Festival.

Nanami is thinking about the things she's enjoyed with Motoharu but "crossing the line" is the one thing she still cannot do. The pair meets up one day to do some shopping, when they run into Takeuchi's older sister who is a store clerk. One day after school while Motoharu is waiting for Nanami, he has a run in with Yuri.

Motoharu asks Nanami out on a date but she blows him of to secretly buy him a present, but it isn't much of a secret because he follows her. The next day Motoharu is kind of mad at her but they are able to reconcile after exchanging gifts. Things are looking good between them until Motoharu has another run in with Yuri.

In her room, Nanami uses this opportunity to ask Motoharu about his past Yuri and it takes some time for him to give her answer. As Motoharu leaves Nanami feels reassured with what he told her but it may not be the entire truth. It turns out that Motoharu's friend Takeuchi has been hiding the truth he knows.