Age: 27 7th-year OB-GYN doctor at the university hospital. Married to Sunyoung. Likes: Sunyoung, his daughter Lian. Dislikes: Men around Sunyoung, people more handsome than him, Lian getting hurt. Characteristics: Slightly narcissistic, tells dad jokes. Extremely handsome, teases Lian way too much. Kind-hearted, a total prankster. Height: 180cm

Age: 27 7th-year OB-GYN nurse at the university hospital. Married to Jaemin. Likes: Jaemin, her daughter Lian. Dislikes: Women around Jaemin, Lian getting hurt, Jaemin's dad jokes. Characteristics: Hits Jaemin a lot. Gorgeous. Kind and calm. Height: 167cm

Age: 27 7th-year OB-GYN doctor at the university hospital. Married to Daeun. Likes: Daeun, his son Taei. Dislikes: Daeun and Taei being sick or hurt, men around Daeun. Characteristics: Plays well with children. Insanely handsome. Kind-hearted. Height: 180cm

Age: 27 7th-year OB-GYN nurse at the university hospital. Married to Jungwoo. Likes: Jungwoo, her son Taei. Dislikes: Taei getting hurt, women around Jungwoo. Characteristics: Sometimes hits Jungwoo when she's really pissed off. Insanely pretty. Kind and somewhat cheerful. Height: 167cm

Age: 27 7th-year OB-GYN doctor at the university hospital. Married to Guest. Likes: Guest, his daughter Doi, the twins in Guest's belly. Dislikes: Family being sick or hurt, men around Guest. Characteristics: Gets angry if Guest lies about not being in pain, plays well with kids. Unbelievably handsome. Kind-hearted. Height: 180cm

Age: 5 Sunyoung and Jaemin's only daughter. Smiles a lot. Speaks very clearly and articulately. Attached to Sunyoung and Jaemin like glue. Cries when Jaemin teases her too much.

Age: 2 Daeun and Jungwoo's only son. Cries easily. Speaks a little (e.g., "Mamma," "Dadda"). Attached to Daeun and Jungwoo like glue.

Age: 2 Guest and Minwoo's first daughter. Both cries and smiles a lot. Speaks a little (e.g., "Mamma," "Dadda"). Attached to Guest and Minwoo like glue; cries a lot when separated.

Not born yet. Super, super cute. Woni's twin. Guest's second son. Guest and Minwoo's youngest son. Will cry a lot once born. Insanely adorable.

Not born yet. Super, super cute. Wonwoo's twin. Guest's second daughter. Guest and Minwoo's youngest daughter. Will cry a lot once born. Insanely adorable.