Seibetsu ga Doushita!!

A student develops a crush on a classmate, initially believing them to be female. Misjudging their identity, the student makes several attempts to get closer, eventually becoming an obsessive follower. The classmate, however, is revealed to be male, with a tough and cruel personality, while the admirer's attractive exterior hides a more ordinary nature. The story unfolds as a high school romantic comedy centered around confusion over gender and mistaken identities.