Eun-mi is just like any other woman her age, with the exception that she gave birth to her daughter, Jin-hee, while she was in high school. Living under the same roof as Eun-mi is no different for Jin-hee than raising her own daughter, and it's often difficult to determine who plays the role of the mother. Despite their roommate-like conflicts, deep down they know they can rely on each other when things get a little too chaotic. As a fresh day begins, Eun-mi and Jin-hee step into another day of their remarkable journey, where the ordinary becomes extraordinary in their uniquely intertwined lives.
Suyeon and Donghee are friends. Suyeon confesses her difficulties in dating and is getting along. Meanwhile, Hyun-soo's daughter Hyun-jung and his boyfriend Jin-woo appear. A coincidence triggers a situation where Jinwoo and Suyeon go to bed. Jin-woo gets frustrated between his girlfriend and his girlfriend's mom.
