Ryou Mukai

One of [Nakamura's](https://anilist.co/character/133626/Okuto-Nakamura) classmates and [Hirose's](https://anilist.co/character/133627/Aiki-Hirose) friends. He has a quiet personality, and usually hangs out with [Takeuchi](https://anilist.co/character/375401/Kouta-Takeuchi) and 3 others.