Meet Misaki Hoshino, a first-year high schooler and the most reliable guy in his class. Around a month after school starts, a teacher tasks him with delivering some handouts to his ever-absent classmate, Momo Hinata. However, upon meeting this girl who spent the last three years as a shut-in, Hoshino's life slowly begins to change. With Momo's feelings trapped behind her bedroom door, how will she make her after-school romcom dreams a reality?!