H-Collab: Cover

MARK & HAECHAN - Billionaire (Travie McCoy ft. Bruno Mars)

MARK & HAECHAN - 첫 눈 (EXO) / Mistletoe (Justin Bieber)

DOYOUNG & HAECHAN - Cinta Luar Biasa (Andmesh Kamaleng)

MCD VOCAL CHALLENGE’ If - TAEYEON | 2021.07.08 

YB X TAEIL, DOYOUNG, JUNGWOO, HAECHAN - A Flying Butterfly | 2021.12.31

Red Velvet×NCT (슬기×예리×태일×해찬×천러), 창밖을 봐요 | 2021

YOUNHA x NCT TAEIL, HAECHAN - Password 486 | 2022.12.31

RENJUN, HAECHAN, CHENLE, JISUNG - Begin Again Vers (東方神起 (TOHOSHINKI))