In particular, Sang-tae's in-laws have come to treat the widower of their deceased daughter as if he were their own son, and they resist the idea of his dating or marrying, lest he move out and take his children with him to a new home.

At the same time, Sang-tae's shy younger sister, Lee Yeon-Tae (Shin Hye-sun), has had a secret crush on her university classmate, Kim Tae-min (Ahn Woo-yeon), for seven years, but has never had the nerve to confess to him.

Jin-joo is beautiful and outgoing, but an academic lightweight whose wealthy parents largely ignore her in favor of Sang-tae and his children, and try to buy her affection with a car and credit cards, which they try to use as means to control her.

Yeon-tae later gets drunk at a club, and by coincidence ends up in a car with Kim Sang-min (Sung Hoon), Tae-min's brother, whose cellphone she accidentally walks off with.

This results in a series of prickly meetings between the two, during the course of which Sang-min, who is a successful pro golfer and former fashion model, falls hard for Yeon-tae.

The final pair is Sang-tae's younger brother, Lee Ho-tae (Shim Hyung-tak), a film director who runs out of money to make his movie, and has become homeless and unemployed and thus forced to return home, where he is not welcome, and Mo Soon-young (Shim Yi-young), a former dancer who now waits tables at the Lee family restaurant, although she doesn't realize that he is her employer's son, and he somehow doesn't realize that she works for his parents.