Minseo is the voice behind "Until the Day" for the 'Into the Ring' OST!

The music video above follows cheerful part-time employee Koo Se Ra (played by Nana) and unfriendly civil servant Seo Kong Myung (Park Sung Hoon) as their relationship goes from friendship to something more. "Until the Day" is an emotional ballad with a rich string accompaniment about hoping for the day someone recognizes your feelings.

Watch the drama MV above and Minseo in the studio recording "Until the Day" below! Have you been watching 'Into the Ring'?