Roy Kim of 'Superstar K4' released a new single on February 12 and swept the domestic charts within hours of its release. On February 13, his latest track 'Only Then' ranked first on major music charts namely Melon, Bugs, Mnet, Naver Music, and Soribada. Written and composed by Roy Kim himself, 'Only Then' tells a story about loving each other more without breaking up. The song ousted iKON's 'Love Scenario' and is epected to stay up on the charts for a longer time. You can watch the music video [here](https://youtu.be/SkN_hWI6n28).