Yoon Gun and Seo Yeon posted a couple photo of themselves.

On the 11th Yoon Gun posted on his Twitter "With miss Seo Yeon YoonSeo duet self-camera".

In the photo, the two are sitting with they faces close to one another, their big eyes stand out the most.

Before, the two had uploaded a photo that hints their collaboration through SNS. Their duet song 'Don't say no' was written by Yoon Gun, an unplugged pop with romantic lyrics of a couple confession their love for one another.

This song will be released on the 13th.

Photo Credit: Yoon Gun Twitter