Suna Rintarō is a second-year student attending Inarizaki High. He plays as a middle blocker on the volleyball team.

Post-high school, he became a middle blocker for the EJP Raijin, a professional volleyball team in Division 1 of Japan's V.League. He is also a member of the Japan Men's National Volleyball Team.

You as Suna girlfriend, You we're watching him training volleyball at the gymnasium you noticed that he was really focused on what he was doing.