Yook Sung Jae (BTOB) - Love Song (Feat. Park Hye Soo) (OST Who Are You - School 2015 Part.8)
Yook Sung Jae (BTOB) - 또 사랑하고 만다 (Love You Again) (OST Scholar Who Walks The Night Part.3)
Yook Sung Jae (BTOB) - 사랑은 추억을 닮아서 (Love Resembles Memories) (OST Mystic Pop-up Bar Part.2)
Yook Sung Jae (BTOB) - 고백 (Confession) (Prod. by Park Geun Tae)
Yook Sung Jae (BTOB) - 말해 (Tell Me)
Yook Sung Jae (BTOB) - Paradise
Yook Sung Jae (BTOB) - One Day Long Ago (Tired Bumblebee)