Smile is a member of the Katase High table tennis club, along with his best friend Peco. Unlike the other members of the club, Smile thinks of the sport as a job or a way to pass time. He does not try to enjoy it for fun and often lets less able players beat him out of consideration for their feelings. The other members of the club nicknamed him Smile because he never does.

Spoiler

In the epilogue, he becomes a ping pong coach for kids and new players.