Koutarou Homura

One of the main characters, he is a biology teacher at Hasumi's high school. He is also a graduate of the school. He is 26 years old, his birthday is February 14th, and his blood type is B. His students affectionately call him "Homura-kun." His basic style is tucked into a tracksuit and a white coat. He has a slightly cynical personality and gets angry over trivial matters like a child. He is also bad at remembering people's faces and socializing. He lacks exercise daily and has the stamina of an elderly person. He always looks listless and lacks the youthfulness expected of his age. He always drinks cocoa at his desk. He keeps a pet frog in the biology lab, named "Yoshio," and dotes on it, but he openly claims that his purpose is to feed it in case of emergency. Hasumi and he often find themselves interacting with each other, finding various excuses to visit the biology lab. He cares about his students and tries to guide them in the right direction without denying their feelings, but as he comes to terms with Hasumi's feelings, Homura gradually begins to have feelings for her. He has an allergic constitution and is prone to allergic reactions to dust, mites, animals, flowers, chalk dust, etc., so he always wears a mask.