Nagisa is a former colleague and current love interest of Hiyori Suzumi who is a track-and-field runner. Nagisa is a friendly country boy who seems to be popular where he lives. He is kind to everyone who he meets and is considered to be well-liked by all. He is kind, patient, and stands up for what he believes in, but he is also rather hot-headed and gullible, having fallen for Aizo and Yujiro's taunts when they were trying to figure out if he had a crush on Hiyori.