The Little Busters! narrative centers on Riki Naoe, a young male high school student who serves as the main protagonist. During his childhood, Riki lost his parents, which left him feeling hopeless and depressed. He was rescued by a group of three boys and one girl his age who called themselves the Little Busters, an organization devoted to fighting evil and upholding justice. Kyousuke Natsume led the Little Busters and had a younger sister named Rin. The remaining two members were Masato Inohara and Kengo Miyazawa, who are friends yet also rivals. They spent time with Riki and played with him during his difficult period, effectively making him the fifth member of the Little Busters. Over time, Riki genuinely enjoyed playing with them, and his grief regarding his parents slowly diminished. At the start of the story, Riki and his friends appear to be in their second year of high school, with the exception of Kyousuke, who is in his third year. They continue to hang out together and enjoy their school life.