The story begins one day in the Little Busters' second year of high school, when they decide to play a game of baseball but need more players. The other members are the leader Kyousuke, his shy and quiet sister Rin, the muscle-obsessed Masato and the kendo user Kengo. Little Busters! tells the story of protagonist Riki Naoe, who is a member of the titular Little Busters, a group consisting of four boys and one girl who have all been close friends since childhood. Like Clannad and Planetarian, it is entirely 'clean', although an 'adult' version was released which featured additional heroines. Little Busters! is Key Visual Arts' sixth Visual Novel.