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Serious
SISO Wave
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OVERVIEW
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Serious
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ALBUM
SISO Wave 4.
SISO Wave
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Credits
PERFORMING ARTISTS
SISO Wave
Background Vocals
COMPOSITION & LYRICS
Sora Yun
Songwriter
PRODUCTION & ENGINEERING
SISO Wave
Engineer
Sora Yun
Executive Producer
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![Listen to Letter to You by SISO[Wave]](/mkimage/image/thumb/Music221/v4/57/d1/83/57d183c2-a9c1-96e0-ed21-7659fdca0ca4/artwork.jpg/375x375cc.webp "Listen to Letter to You by SISO[Wave]")
