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Yakusoku no Ao
- Artist
- Reworu
- Song
- Yakusoku no Ao (約束の蒼; Promised Blue)
- Lyrics
- Yairi
- Music
- Yairi
- Other Information
- Arrangement: Yairi
- Information
"Yakusoku no Ao" is a song recorded by Reworu. It can be found as track #14 on her debut album Gokusaishiki.