The Jung sisters, Girls’ Generation’s Jessica and f(x)’s Krystal, have just released their first duet track for the OST of SBS upcoming drama series, ‘To The Beautiful You’ (For You in Full Blossom).

On August 15th, Jessica and Krystal released their latest track titled “Butterfly” throught various music distributions websites. The song has a playful melody while its lyrics sing of the innocence that a girl and boy goes through experiencing their first love.

‘To the Beautiful You’, which also starring SM Entertainment labelmates f(x)’s Sulli and SHINee’s Minho will premiere on August 15th at 9:55PM KST on SBS.

Check out the track below!