"Let's play badminton together forever." That was their promise. Naruse and Hodaka, who have been doubles partners since elementary school, are now living together as a couple. After graduating from high school, Naruse joined a corporate team while Hodaka continued playing in the university badminton club. While Naruse expresses his pure desire to team up again soon, Hodaka feels he has reached his limit... Despite being close, their feelings don't quite reach each other. Through encounters with various people, what answers will these two arrive at?