Minseok lives next door. His friends had a gathering in his apartment, which one of his friends, Kyungsoo, insisted to cook them a five star meal. That five star meal went downhill when Kyungsoo set the kitchen on fire from using too much cooking oil. Minseok has no other place to go besides moving in with the girl who lives next door in Apartment 112, Kang Yeonhee. 

Minseok and Yeonhee are not on good terms, due to Minseok's rough rejection to her best friend's confession, Youn Minji. She takes part in abusing his leg which results in him badly bruising it and unable to walk well. From the skin consuming guilt, she takes him in until he feels better. But, what if she doesn't want him to leave?