Episode 6 of Romance in the House opens with Ae-yeon going about her daily chores, seemingly trying to distract herself from the lingering effects of Moo-jin's confession. Frustrated with his lack of involvement, she confronts him and tasks him with dealing with a troublesome neighbor.
Meanwhile, Mi-rae and Tae-pyeong's relationship continues to develop. Their interactions are filled with awkwardness and blushing, but their connection grows stronger. However, Tae-pyeong's personal life is complicated by his demanding father, who constantly messages him and invites him to family functions.
A significant turning point in the episode occurs when the truth about Moo-jin and Jeong-in's relationship is revealed. Jeong-in confirms that Moo-jin was not the one who abandoned her when she was pregnant. Instead, it was a different man who had impregnated her and then disappeared. Moo-jin, feeling a sense of guilt and responsibility, had helped Jeong-in by giving her his entire fortune and encouraging her to leave the country.
The revelation of Moo-jin's past actions sheds light on his motivations for purchasing the villa and his desire to reconcile with Ae-yeon. It is revealed that Moo-jin had worked various jobs, including modeling high heels, to accumulate wealth and fulfill his dream of returning to Ae-yeon.
As the episode progresses, Mi-rae's relationship with her father becomes strained due to her brother's decision to move in with Moo-jin. Her father, who has been hiding a secret about Tae-pyeong's paternity, is also experiencing internal conflict.
The episode culminates in a series of misunderstandings and dramatic confrontations. Ae-yeon and Moo-jin find themselves in the same motel, leading to a heated argument and a physical altercation. Mi-rae and Tae-pyeong also encounter unexpected challenges, as Tae-pyeong reveals his true relationship with his father and Mi-rae faces a difficult decision about her career and personal life.
The episode ends on a cliffhanger, leaving viewers eager to see how the characters will resolve the conflicts and misunderstandings that have arisen.