1. W Composed by SWEETCH Arranged by SWEETCH Piano SWEETCH String SWEETCH Drum 한성환 Bass 육상근 Guitar 김다현 Mixed by 최형 Mastered by 권남우 @821 Sound Mastering 2. Winter Poem Lyrics by C’SA, BIN, SWEETCH Composed by SWEETCH, C’SA, 디오리, BIN Arranged by SWEETCH, 디오리 Piano SWEETCH Keyboard SWEETCH, 디오리 Drum SWEETCH Bass SWEETCH String 디오리 Chorus C’SA Mixed by 최형, 임홍진 @ JYPE Studios Mastered by 권남우 @821 Sound Mastering 3. 눈이 오는 날 Lyrics by 추대관(MonoTree) Composed by 추대관, 권애진(MonoTree) Arranged by 추대관(MonoTree), 박중훈 Vocal Directed by 추대관 Background Vocals by 권애진 Guitar Performed by 김동민 Piano Performed by 박중훈 Protools Operating by 강선영 Digital Editing by 추대관 @MonoTree Studio Recorded by 강선영 @MonoTree Studio Mixed by 유현 @2304 Studio Mastered by 권남우 @821 Sound Original Publisher : MonoTree 4. First Love Letter Lyrics by 최수빈, SWEETCH Composed by SWEETCH Arranged by SWEETCH Piano SWEETCH String 디오리 Keyboard SWEETCH Mixed by 최형 Mastered by 권남우 @821 Sound Mastering 5. 내년 겨울에도 기억해줘 Composed by SWEETCH Arranged by SWEETCH Piano SWEETCH Mixed by 최형 Mastered by 권남우 @821 Sound Mastering