Se Jin finds Yeon Doo’s pregnancy diary and reads what’s inside. Although she finds clues about Yeon Doo and Tae Kyung’s fake relationship, she doesn’t understand what they mean yet. Meanwhile, In Ok wishes to celebrate Yeon Doo’s birthday by cooking for her. The Gong family is willing to join, except for the grandmother, who despises Yeon Doo. (Source: Viu)