Behind The Scenes Of “While You Were Sleeping” – Yoon Kyun Sang and Lee Sung Kyung made a cameo


While You Were Sleeping” released more behind-the-scenes  where Yoon Kyun Sang and Lee Sung Kyung made an couple cameo on the drama.

Lee Sung Kyung and Yoon Kyun Sang  wear matching pink clothes and play a lovey-dovey couple next to Jae Chan (Lee Jong Suk) and Hong Joo (Suzy) who are having their date.

Lee Jong Suk has also posted a group picture on his Official Instagram.


Check out the BTS video clip below: