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???? Sung Hae-in YouTube / @prodbyhaein Post link https://brunch.co.kr/@haein011001 Contact for beat production/collaboration/lesson inquiries (contact) ???? Instagram (@prodbyhaein) instagram.com/prodbyhaein ???? Kakao Talk open.kakao.com/o/sc0YSyjg ???? Email (e-mail) [email protected] #midi #producer