Romance In The House is a K-drama that follows Byeon Mu-Jin as he returns to his former family after 11 years. Previously enjoying a happy life with his ex-wife Ae-Yeon and their two children, Mi-Rae and Hyeon-Jae, Mu-Jin's failed business ventures led to their separation. Now, more than a decade later, he reappears as the new landlord of their apartment building.Mu-Jin is determined to rekindle his relationship with Ae-Yeon. While Ae-Yeon is open to the possibility of reconciliation, Mi-Rae strongly resists the idea. Meanwhile, Mi-Rae starts to develop feelings for Nam Tae-Pyung, a fellow employee at the mart where she works, which happens to be owned by Mu-Jin, though she is unaware of this connection.