Lee Hae In - 내게 기대 (Lean On Me) (OST Mental Coach Jegal Part.6)
Lee Hae In - Rewind (OST EXchange 2 Part.5)
Lee Hae In - 사랑인거야 (It's love) (OST It's Beautiful Now Part.2)
Lee Hae In - Permeate (OST Weightlifting Fairy Kim Bok Joo)