白川 優衣

Yui is the main heroine of the game. She is a pretty responsible girl and very talented in her studies, always being at the top of her class. Being the delegate of her class, she has to make sure that the students can follow their studies but she is - unfortunately - confronted with Sakurai Kazushi, the worst student of the school. She spends her time sermonizing him to finally start working and increasing his grades. Because of her "ball-breaker" character, she thinks he has to hate her and she thinks that when he looks at her, it's with contempt and hatred.

However, she realizes that Kazushi's eyes are different, full of tenderness. New feelings are growing in her ...
She then decides to write an anonymous letter asking if he is interested in a particular girl, but does not find an opportunity to give it to him.

One day, as she changes to the gym class, she sees a porn magazine under Kazushi's chair. So she decides to hide it and summon Kazushi after club activities so that he can give explanations ...

She remembers buying a pink bike with ribbons on fists in Kazushi's parents' store when she was a child. She also remembers a little boy who had made fun of the choice of her bike.