Jung Hae In's performance is top-notch but Koo Kyo Hwan is GOAT. His comic scenes are amazing! This series is sad and dark in many moments but they kinda balanced with the comic scenes of Han Ho Yul x Ahn Joo Hoo, making it an incredible subtle bromance. They both have amazing chemistry. What a supporting cast! Some actors are also in "Weak Hero Class 1". Son Suk Ku character was so perfect that made me to dislike him most of his scenes. Can't forget the amazing OST and opening theme. Perfection! 10/10