Source: Lee Sang-yoon to star in tvN.
Well hit me with a stick and call me crazy! This was totally unexpected! I would have never picked him as a possible lead in a million years; however, if you want to peek my interest, then cast Lee Sang Yoon and I’ll be there…unless they pick the worse possible female lead ever! Good thing a couple of them are occupied in dramas and movies right now. We will see. There might be hope for this now! Okay, for now, I am in!

UPDATE: Kim So Eun and Shin Sung Rok added to the cast! Source: Soompi News