Hosaka (保坂) is a third year student and the captain of the volleyball club who greatly admires Haruka Minami that he would like her to become the volleyball club's manager and his girlfriend. He has a tendency to act cool, stripping and fantasizing in front of people, to the point of being considered a narcissist, causing those who know him to label him as a weirdo, especially Maki that her signature phrase of labeling him as "disgusting".
Hosaka is voiced by Daisuke Ono.
- Hosaka makes his first appearance in Minami-ke Chapter 008.
- Hosaka is skilled at cooking that he is a perfectionist at it.
- Hayami (Hosaka's friend) is entertained by Hosaka's antics that he often eats the lunches.