"Live with sincerity" is Natsuki Taiyou's motto. It's first day of high school and as Taiyou heads to school, he sees a girl named Hinata. He falls in love with her at first-sight and suddenly confesses to her. She accepts his confession but then runs away without saying who she is. Later, it turns she is Taiyou's classmate. Taiyou feels like there is some sort of destiny between them; however, the next day, she doesn't even remember who he is. How can that be...?