Rules of Dating Trash

Thanks to a trash ex-boyfriend, Seon Ihyeon was forced to take leave of absence from school and is now returning after 3 years. Determined not to associate with men again, Ihyeon just wants to quietly finish the rest of her time at university... But now, a guy even worse than her ex has appeared in front of her - Nam Chan-wook! She wants absolutely nothing to do with him! Continually running into each other is uncomfortable enough, but to even live in the same boarding house?! Ihyeon pushes Chan-wook away, and he refuses to let her go. An anxious campus romance!