Haruhi Kasuga, a freshman at Neko High School, is a girl as cheerful and warm as the spring sunshine. By chance, she became the manager of the volleyball department.
This is a story about a "game nerd" who is most afraid of trouble and is slowly "conquered" by a "little sun" who is least afraid of trouble. From "troubled relationships", to "maybe I can try", to "I just don't want to lose you" - between the hustle and bustle of the gym and the tranquility after school, two completely different heartbeats are quietly synchronizing.