Just Because! is a story about four high school students who are about to graduate. The peaceful days they have known up until now will suddenly be disrupted as they all find themselves in a whirlwind of emotions.
Haruto Souma has moved back to his hometown after living in Tokyo for several years. He reunites with his childhood friend, Eita Izumi, who is now a high school student. Haruto also meets Mio Natsume, a quiet and reserved girl, and Hazuki Morikawa, a cheerful and outgoing girl.
As the four of them navigate their final year of high school, unexpected feelings and relationships begin to develop among them. They must confront their own insecurities and fears as they try to figure out what they truly want in life.
Just Because! is a heartwarming and realistic portrayal of the struggles and joys of adolescence, as well as the importance of friendship and love in shaping our futures.