- Season 1 (episode 1-13 end):
Little Busters is an adaptation of Key's romance adventure visual novel of the same name. Riki Naoe was orphaned when his parents died, but his depression is slowly lifted when he befriends a group of kids calling themselves the Little Busters. The series takes place during his second year of high school.
Season 2 (episode 1-26 end):
At last, the baseball team of the Little Busters has reuinted, with many new friends among old ones. However, peace for the fun-loving students would not last forever. As Riki Naoe learns the truth behind his narcolepsy and the other mysteries around campus, he realizes that the dream must come to an end, and everything that had stopped starts to move.