Yong-sun and Byul-yi are roommates. Yong-sun is a passionate, emotional person, while Byul-yi is the polar opposite, deadpan and not knowing how to deal with her emotions due to her past. Yong-sun doesn't know it, and just feels like she's trying her best to be a good roommate, but she's slowly melting Byul-yi away, little by little. Of course, that's not to say that things are always smooth-sailing. A story of how opposites attract, but also repel.