Download SANDEUL & HYOJUNG (OH MY GIRL) & HYOJIN (ONF) - 366일 (366 Days) MP3 from album "HELLO! WM_V". All MP3/songs are for personal, non-commercial use only. Please support SANDEUL & HYOJUNG (OH MY GIRL) & HYOJIN (ONF) by buying their original song, Available on iTunes, Spotify, JOOX, Amazon, or other Official Music Store. Best regard.