In order to reconcile with her childhood friend, a very shy girl aims to befriend everyone in her class.

Many of us know what it is like to transition to a new school with few to no friends in a new environment, going through the arduous process of getting to know people again. Bocchi Hitori knows this struggle all too well, having just graduated from elementary school and thrown into middle school. Unfortunately, she suffers from extreme social anxiety: she faints when overwhelmed, vomits when nervous, and draws up ridiculously convoluted plans to avoid social contact. It does not help that her only friend from elementary school, Kai Yawara, will not be attending the same middle school as Bocchi. However, wanting to help her, Kai severs ties with Bocchi and promises to reconcile with her when she befriends all of her classmates in her new middle school class. Even though Bocchi has no faith in herself, she is determined to be friends with Kai again. Summoning all of her courage, Bocchi takes on the daunting challenge of making friends with her entire class, starting with the delinquent-looking girl sitting in front of her.—MAL Rewrite

Hitori Bocchi, a girl with extreme social anxiety, has had only one friend throughout elementary school. When Bocchi learns they'll be split up after graduation, she makes a promise to her: "By the time of my middle school graduation, I'll make friends with everyone in my class." And if she can't... they won't be friends anymore?. But Bocchi has a hard time talking to people. When she gets nervous, her legs cramp. She can't look other people in the eye. She doesn't even know how to make friends. Every way she thinks of to make friends ends up failing. Will her friend-making plan pay off?!.—Crunchyroll