Tsubasa Sonokawa is the protagonist in the story, a young high school girl of fifteen years old. She fell head over heels in love with her older schoolmate after he saved her from fainting due to anemia at the train station. Tsubasa believed it was fate and began visiting him daily in his classroom, only for him to dismiss her feelings as "heavy" and break up with her. However, fate intervenes once more and she takes over her friend Yuri's position as team manager for the boys' basketball team, where she meets Aki, a boy who seems to share a deeper connection with her than she initially expected.