Experienced in unrequited love confessions, Se Ri collaborates with her friends to team up with Han Yun Seok, a new transfer student from Seoul. Their goal? To carry out “Operation Love” so she can confess her feelings to the school's most popular boy, Kim Hyeon. Many of her subsequent efforts lead to comedic moments that reveal her adorable and lively personality.

(Source: Netflix)

After going through a divorce, Ae Yeon experienced difficulties raising her two children by herself. Now, 11 years later, she works part-time at a big mart. Her daughter and son are all grown up. The daughter, Mi Rae, wanted to become a person her mother could rely on. She works as the MD at a big mart. She is also the breadwinner of the family. The son, Hyun Jae, has a unique charm, but he is also the troublemaker of the family.

One day, Moo Jin appears in front of his family as the owner of the villa building where they live. Moo Jin hopes to reunite with his beloved ex-wife Ae Yeon and even tries to seduce her, but the daughter, Mi Rae, is strongly opposed to her father's idea. Unlike his sister, Hyun Jae supports his dad's attempt at reconciliation.

Meanwhile, Mi Rae gets involved with Nam Tae Pyung. He was once a member of the national taekwondo team and now works as a security guard at the same mart as Mi Rae. He hides his real identity and the fact that his father owns the mart.

(Source: AsianWiki)