Singer-songwriter Yoon Gun took a selca together with Girls' Generation's Seohyun.

On February 11th, Yoon Gun tweeted, "A selca with Seohyun, YoonSeo duet", and uploaded the photo above. In the photo, Yoon Gun and Seohyun look affectionate like siblings.

Earlier today, Yoon Gun and Seohyun released their duel track "Don't Say No". The song, which was written by Yoon Gun, was supported by the sounds of the guitar along with a stringed quartet, as well as the lovely melodies of the piano, going for an unplugged pop genre.

If you haven't heard the song, check it out below!