Xiumin has lived a rather peaceful life. As his 27th birthday draws closer, he is starting his first job after college, working a filing job at a police station in Seoul. His apartment resides within a newer building, which is not far from where he works. His apartment is in the third section of the building, the sixth floor, the fifth apartment on the floor. It is here where he meets the people who disrupt his peaceful life in the best way, and one man in particular who steals his heart