He is a high school student in his third year and head of the history club. He is also one of the four boys and one girl who are trying to win Kae Serinuma's affection.
Mutsumi is depicted having straight shaggy brown hair that is styled on either side, slanted light brown eyes, a calm expression and he is often seen with a soft, genuine smile.
(Source: Watashi Ga Motete Dousunda Wikia)
