What is Mom - Season 1 Episode 1 1

Married couple Seo-Hyung (Kim Seo-Hyung) and Seung-Soo (Ryu Seung-Soo) moves in to the home of Moon-Hee (Na Moon-Hee) under the plea that their home is under construction. Seo-Hyung is Moon-Hee's second child. Moon-Hee's first child Jung-Hak (Park Jung-Hak) and his wife Mi-Sun (Park Mi-Sun) already live with Moon-Hee. Meanwhile, Mi-Sun isn't to happy with Seo-Hyung 's family moving in. One day, Mi-Sun goes to the neighborhood public office and learns that Seo-Hyung's family has already registered their new address at Moon-Hee's home. Mi-Sun is shocked and runs to see Seo-Hyung.