She signed a contract with Roasting House, a music agency based in Sweden, and began her full-fledged activities primarily focused on international markets(2013).
The theme song "Happiness," for the drama series "Dear Sister," which she provided the lyrics for, became a hit.
The song "Crystal Snow," which she wrote lyrics and composed for BTS, reached the No.1 spot in 17 countries, and the album it was included in became a worldwide hit.
The best album "Finally" by Namie Amuro, for which she provided vocal direction for 15 songs, achieved double-million hits(2018).
She became a topic for writing the lyrics for the theme song "Fight for your heart" for the drama series "TWO WEEKS," starring Haruma Miura(2019).