Interior designer Mako is unable to forget her first love from childhood, who helped her when she was bullied back in elementary school days. One day, a letter arrives from someone named Kosuke—the same name as the boy Mako can't forget. It says, "Do you remember me? Please contact me, because I want to see you after all this time." It's been 22 years since she last saw her friend, but Mako is excited to see him again. But the "Kosuke" who shows up to meet her is far from the man she imagined.

This drama is about Yang Nam Jin (Park Yoon Jae), a normal young man from the countryside who is not satisfied with his fate and boldly challenges it to pioneer his own road.

Kuraki Naotake is the top ace of the Public Safety Department. Osugi Ryota is a top-notch straight-talking detective from the MPD. Akeboshi Misa is an investigator from the Public Safety Department. Together, the 3 of them investigate on the bombing incident in Shinjuku. Naotake had specifically requested to be on the investigation team as he had lost his wife in the said incident.

Love between brothers. Love between a teacher and a student. A junior who wants to flirt and a senior who got carried away. Various complicated love stories among friends that are interconnected.

Moon Seung Mo is a popular chef. Due to the sudden deaths of his parents by fire, he moves to Seoha Village. His peaceful daily life suddenly changes there with the sudden appearance of Yoo Yoo Jin.

Meanwhile, Yoo Yoo Jin is a world famous fashion designer. She works under the name of Yoo Bella. One day, she has a car accident. The car accident causes her to lose her memory completely and she ends up in Seoha Village. She acts very eccentric there and becomes a troublemaker. Due to her behavior, she picks up the nickname “Yoobyeolna”.

A strong-willed disciplinarian mother (tiger mother) faces mountainous pressure raising her daughter, while her husband (cat father) has an opposite view of how to raise their daughter. Qian Qian is the school-aged daughter of Bi Shen Nan and Luo Su, and the princess of the family. After learning from others that the educational foundation starts in elementary school and witnessing first hand the difficult process of entering a great school, Bi Shen Nan finally realized that they have spoiled their daughter for way too long. Determined to catch her daughter up with all the other kids, she has quickly grown into the role of a tiger mom while her husband maintains that the happiness of Qian Qian is the most important, even if that means being academically behind. Mixed in the bag are two sets of opinionated grandparents and the reappearance of Luo Su’s gentle ex-girlfriend.

Hong Ling is an innocent, naive mermaid, who is oblivious to the world beyond the waters of her own world. One day, she happens to upset the Sea King and is sent to the human realm. In this new world, she meets a human boy, who she will eventually fall in love with. Initially, things may appear to be a joke for Hong Ling, but later the consequences of her actions comes at a much larger price than she will have imagined.

The drama is about a first-class impersonator of a trot singer named Lilac, and his daughter Shin-hye in the process of getting away from the deceptive acting and finding real happiness.