Kodaka Hasegawa, a recently transferred student who has trouble making friends due to his scary appearance, encounters his classmate, Yozora Mikazuki, talking to an imaginary friend. As they both talk about their troubles in making friends, Yozora gets the idea to create a Neighbors Club dedicated to help people make friends. After Kodoka and Yozora post up recruitment posters, another student, Sena Kashiwazaki, comes to join, saying that, despite her popularity, she also wants to make some true friends, though she does not get along well with Yozora.