When police officer Kyungjin met with Myungwoo inadvertently she discovered that responsible teacher was an extremely wonderful guy. At night, Kyungjin got into a struggle with a whole lot of high school children and got problem in a gun struggle between rival drug dealers. Myungwoo strove to help her but then something happened that compels them remained together all day. They got nearer to one another and Myungwoo was not able to repulse the character. He fell in love . 1 day, when Kyungjin had been pursuing a notorious criminal, Myungwoo helped her , but perhaps not realizing that what would happen that day changed their relationship forever...