Little Busters!
The OVA series "Little Busters! EX" also has two main pieces of theme music: the opening theme "Little Busters! EX" by Rita and the ending theme by Suzuyu. The rest of the soundtrack for the entire anime series is sampled from albums released for the visual novels, "Little Busters! Original Soundtrack" and "Little Busters! Ecstasy Tracks", and the "Little Busters! Refrain Original Soundtrack".