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girl sub-unit#18 sub-unit on Spotify
Moon Sua X Siyoon
문수아X시윤
Debut:April 7, 2025
Company:MYSTIC STORY
About
Moon Sua X Siyoon (문수아X시윤) is the first sub-unit of Billlie. They made their debut on April 7, 2025 with the digital single "Snap".
Main Group
Billlie
Parent Group
