虚空に咲く花

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 7603927e-cf57-4d08-92ea-3362baa54948 (CC0).