Asuma Mutsumi is a third year high school student,
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.

His usual attire is his school uniform, a red tie, a plain white shirt, black slacks and, sometimes, a sweater. At home he is often seen with a sweater and thick glasses. Mutsumi is the tallest of the four original suitors with his long, lanky figure and broad shoulders