One month into high school, Hoshino Misaki is already known as the most dependable guy in class. One day, he decided to bring some class notes to his classmate Hinata Momono, who has not come to school at all since school started. It turned out that she has been a recluse for three years without stepping outside once. Upon meeting her, Hoshino's days began to change. From the other side of that door, there was something he wanted to tell her… An after-school romantic comedy begins… between two people who don't even know each other's faces!