Biography
PeriTune is a Japanese dojin circle name that composes royalty-free fantasy-style music.
The composer behind PeriTune is むつき醒(Sei Mutsuki) of Garnet Cathedral.
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Artist's other names:
https://www.last.fm/music/Garnet+Cathedral
https://www.last.fm/music/SeikoP (vocaloid work)
https://www.last.fm/music/Sei-Peridot.
Biography text from Last.fm, available under CC BY-SA.