Hirotaka Wakamatsu

Hirotaka Wakamatsu is in class 1-D, and is one of Nozaki's friends from their basketball team in middle school. He joins Nozaki's staff initially to do erasing,but later on to do tone work. He claims that the only person he cannot stand is Yuzuki Seo, which is somewhat ironic due to the fact he is a fan of the Choir Club's Lorelei, who is actually Seo herself. Strangely, though he has chronic insomnia, he falls asleep within a few seconds when listening to her calming songs.