Young Lady and Gentleman

S1, E6: Young Guk and Jae Ni fight when he mistakes Jae Ni's new friend, who happens to be a boy, as her boyfriend. Dan Dan helps the father and daughter make up, and Young Guk feels grateful. Meanwhile, Yeon Sil's mom, brother, and niece return from working abroad for five years. She asks them to come to the annex at Young Guk's house and trouble ensues.