Tsubasa Sonokawa is a 15-year-old schoolgirl who fell in love with a veteran who saved her after fainting at the train station because of anemia. From then on, he went every day to his class, thinking that they were meant for each other. However, it is rejected. On the same day, she is invited by her friend, Yuri, to help her run the school basketball club. So she meets Aki, a boy who can change the direction of his heart.