The soundtrack of ‘The King 2 Hearts’ featuring Girls’ Generaiton’s Taeyeon has topped the music charts.

The theme song of MBC’s ‘The King 2 Hearts’ titled ‘Missing You Like Crazy’ was released Wednesday and have swept the major music sites such as Melon, Mnet, Bugs and more.

The song is a ballad with bit of modern rock and punk, in more composed and sad mood. Conveying the heart of Ha Ji Won’s character.

Taeyeon was reported to have been able to participate in the OST despite her busy schedules as she made a promise with the musical director, Lee Phil-Ho in the past working together for ‘Beethoven Virus’ OST. Lee Phil-Ho shared that he has made special request only to Taeyeon, “I thought of only Taeyeon for the singer who can sing the main title. I haven’t thought of anyone else but Taeyeon. And she agreed keeping her promise.”