2.43: Seiin Koukou Danshi Volley-bu

2.43: Seiin Koukou Danshi Volley-bu is a sports novel series written by Yukako Kabei and illustrated by Aiji Yamakawa. It is published by Shueisha.

Plot
The story follows Yuni Kuroba and Kimichika Haijima, two childhood friends who reunite in middle school. The two form an ace combo on their volleyball team until an incident at their final competition causes them to stop speaking to each other. After graduating from middle school, they attend Seiin High School, where they join the weak volleyball team and aim for Nationals.

Official
Anime website