Osamu Mayuzumi

Mayuzumi is a high school Biology teacher who donates a lot of blood to prevent his "true" personality from coming out. If he goes more than a week without donating, he becomes short-fused, highly energetic and ill-tempered; otherwise, he is meek and doesn't stand out too much. Mayuzumi has been friends with Yamada since high school, and occasionally uses his donor card to donate blood more often than is allowed. No voice actors have been added to this character. Help improve our database by searching for a voice actor, and adding this character to their roles .