MONSTA X's Kihyun is taking part in the OST for tvN's Wednesday-Thursday drama "Hot Goodbye." According to OST producer Stone Music, Kihyun will release "Now" (Jigeum), Part 1 of the drama's OST, at 6 p.m. on the 12th. "Now" is a pop-rock song that blends lively guitar with dynamic drums and features the rough yet refreshing texture typical of band sound. Kihyun's energetic vocals and confident lyrics deliver a sense of liberation, and the song will be used in the opening title sequence of every episode. "Hot Goodbye" (written by Ahn A-reum, directed by Jung Ji-hyun and Heo Seok-won), which premiered at 10:50 p.m. on the 11th, is a coming-of-age story about a trio of unknown comedians chasing their dreams who meet a mysterious woman and each find their own tomorrow. The cast includes Kang Hoon, Lee Yi-dam, Jo Hyun-chul, Moon Hee, Kim Jung-jin and Yoon Ga-i.