Yang Geun-seok

An unlikely romance brews between Dong-chu, a tough-acting thug with a tender heart, and his bookish, and recently single, IT consultant neighbor, Se-jin.

Three nights before enlisting, Seung-wook decides to leave his mark since he can't avoid the military so he flirts with everyone. However, his school senior So-yoon nor his blind date Il-hong will fall for him. The night before he leaves for the army, Seung-wook decides he's going to see some action with the two girls. The project of 'leaving a mark' starts now.