だから僕は音楽を辞めた  - ヨルシカ    Covered By 芦澤 サキ

화이트해피(ホワイトハッピー)-코사메커버

This is a collection of both Yaiba's character song, and the Yaiba/Aion character song. Both pretty good.

The theme “Surveillance” from the Otome game Killer and Strawberry.