今日は学園祭

On these albums

Mana-Khemia Original Soundtrack中河健 & 阿知波大輔 · 2007Soundtrack

ガスト20周年記念CDボックスVarious Artists · 2015Soundtrack

Source: MusicBrainz recording 128dbb6a-4c3e-4834-a6fc-7a2fcad1d547 (CC0).