B.O.Y's Kim Kook Heon is releasing another OST single!

According to the production team of tvN drama 'Navillera,' the Music Works idol will be releasing the show's 2nd OST single "Butterfly" on April 6 at 6 PM KST.

"Butterfly" was first revealed during the drama's second episode, when the main characters – ballet prodigy Deokcheol and elderly 'ballerino hopeful' Chaerok – were practicing ballet movements together. The song also appeared in the fourth episode during a comical mid-driving lessons quarrel between the two.

Meanwhile, Kim Kook Heon has previously participated as a soloist on a number of drama OSTs, having recorded both 'Secret Forest' single "As If To Love" and 'Jugglers' single "You are the Only One."