"But... What can I do?? He smiled first..." - Sunoo is new. Quiet. Soft-spoken. The kind of boy everyone calls "harmless" without even thinking twice. So when Eunjin suggests it might be fun to mess with him... nobody really thinks it's a big deal. Especially not Sunghoon, who already has a girlfriend, already has a life, and definitely isn't supposed to get involved. It's just a game. Just a little acting. But is it Just acting or... Something more..?