Shogo is close friends with Ryou and often plays games with him or they both try to wake Ritsuka up.
A classmate and a friend of Ritsuka's and often tries to get him involved with basketball and other activities. he attends and is impressed with his live performance.
He joins with Ryou for a game of basketball and invites Mafuyu to play with them, since Ritsuka is sleeping. Shogo considers him as an accomplished music player since Ritsuka invited him.