Provided to KRplus by Kakao Entertainment Winter Sleep (겨울잠) · IU · Donghwan Seo · IU · IU Pieces ℗ 2021 EDAM Entertainment,under license to Kakao Entertainment Released on: 2021-12-29 Author: 아이유 Composer: 아이유 Arranger: 서동환 Auto-generated by KRplus.