The character Natsuhiko is not present in the OVA "Hōkago no Shokuinshitsu". This narrative centers on the evolving romance between two male teachers, Mitsurou Kawase and Toshiaki Kazama. Supporting characters include Mitsurou's younger brother Hitoshi and the school rector. Existing plot summaries, character lists, and production materials for this title contain no mention of Natsuhiko.