Yonghwa wanted to kill the daughter of the people who killed his father and mother. He looks forward for revenge when he finds the daughter of the people who killed his parents and that girl is Seohyun. Yonghwa move's in the apartment next to her's enrolls in the same school as her and gets a job where she works. Yonghwa is a 20 year old boy who looks for revenge on the people's daughter who killed his parents but everything changes when he meets her at first he feels hate and just a big temptation to kill her but when he takes her to bake cupcakes with him he finds a lot about her and when the lights go out he finds a that little girls and innocence about her but then a strange man comes in but Yonghwa takes no worry about him and also when both of them in school are assigned to do a project together on plants that are not around where they live he takes this as the prefect oppurtunity to take her to the countryside and kill her then, but when they get there he forgets all about killing her and the hatred he has for her, as they play around he finds her hidden bubbly,childish personality but when they get back the next day he finds the stange man doing weird things in front of  Seohyun's apartment and finds him always at night just wandering around her apartment but Yonghwa doesn't care he still wants to make Seohyun feel what he felt when his parents were killed but that all changes when he finds out the strange guy is also their to kill Seohyun becasue her parents had killed the strangers parents to and becasue she is the srangers first love but she rejected him so he wants revenge on her and that casues for Yonghwa to suddenly have the urge to protect Seohyun but refuses the idea and instead goes and tells the strange man why he is their to and they both team up but when the man tells Yonghwa when and where and how he is planning to kill Seohyun he suddenly feels like he needs to protect her and he does, he takes her away with him on a 'trip' to Seoul for 2 months before they enter school again and that strange man gets very angry and finds Yonghwa and Seohyun and now is planning to kill both of them and Yonghwa fids out, But will Yonghwa fight to keep him and the woman that he is falling in love with or will he save himself and do what the strange man says and give him Seohyun? but what Yonghwa doesn't know is their is a woman on Seohyun's back also trying to kill her for stealing her 'man' away during high school. Would they survive together? and will Seohyun still be with Yonghwa when she finds out what his plans were for her?