Trata sobre Hachiman Hikigaya, un solitario con un complejo de inferioridad quien es forzado a unirse al "Club de voluntariado" que ayuda a los estudiantes con sus problemas... a toda costa.

Hachiman es testigo de cómo Yui intenta encajar o separarse de su grupo social. Más tarde, el club recibe una nueva solicitud de un viejo amigo de Hachiman.

As Hachiman continues to hone his skills in the art of being left alone, another student comes to him with a new request for the club.

Hachiman has a small crisis concerning little sisters and what they mean. Afterward he receives a mysterious text, outlining the club’s next student request.

Hachiman’s sister is asks for advice from her classmates. Apparently she has been acting strange lately, and the Service Club intends to find out why.

Shizuka announces that Hachiman and Yui must go on a recruitment drive to find more members, and they know exactly who to target.

Hachiman tries his best to relax during Summer break but constant texts from Shizuka concerning the Service Club activities prevent him from doing so.

Shizuka readies a bonfire and a "test of courage". Later, Yui recognizes the limo that hit Hachiman.

Yui notices a rift forming between Hachiman and Yukino. Hachiman is nominated to serve on the committee for the school’s upcoming cultural festival.

Hachiman and Yui check on Yukino. Later, Hachiman shakes things up with the committee when he decides to alter their mindset.

Soubu High’s Cultural Festival continues and Hachiman is stuck carrying out his duty as a committee member by documenting the day’s events on film.

A mysterious request to helm the upcoming sports festival arrives. The group must band together to figure out a way to pull it off.