Jeong Hae-wook

Sang-hoon is a lowlife gangster, a debt collector exercising thuggish ways to collect his money. The recipient of nothing but anger since his childhood, he expresses himself through violence. When he finally encounters someone who can stand up to him, feisty school-girl Yoon-hee they become unlikely friends.

Da-Jin and Jae-Young have been in an all too comfortable relationship for the past six years. Although they don't live together, their apartments reside side by side. But trouble brews for the couple when they begin to fall for their respective co-workers. Can Da-Jin and Jae-Young's relationship survive these outside temptations?