First Kiss for the Sixth Time - Season 1

Min Soo Jin is a receptionist working at Lotte Duty Free mall. She is a person who never had a boyfriend nor has been kissed. It's her 25th birthday and she wishes to get a boyfriend. While at work, she meets a woman who asks her for direction. However, that woman forgets her passport on the reception table. Soo Jin goes looking for her but then realize that it was not a passport. Suddenly, that woman appears and tells Soo Jin that she will repay her for her kindness. She asks for Soo Jin's wish and somehow mysteriously know that Soo Jin wants a boyfriend. The mysterious woman makes 7 cards miraculously appear out of nowhere and tells Min Soo she is going to meet a handsome guy in 10 seconds. Suddenly, a handsome guy walks over and tells Soo Jin that he will wait for her outside until she finishes her work.

IT tycoon, Lee Joon Gi, tells Soo Jin that he will wait for her outside until she finished work. Soo Jin clearly remembers that he is an actor and their mall's model, but her co-workers disagree with her. After leaving work, Joon Gi takes her to dinner at his house and plans an event for her birthday. He shows her picture of their childhood. She can't remember any of that, but he turns out to be her "Church Oppa". He then tells her that every year, on her birthday, he was contemplating whether to confess to her or not. But states that today, on her 25 birthday, he plans to confess to her. When he is about to kiss her, she is suddenly back at the mall's information counter again. One of the cards changes and Joon Gi's photo shows up on it. Suddenly, Park Hae Jin appears. Turns out, he is her manager.

Soo Jin meets Park Hae Jin, her manager at work. He is angry at Soo Jin for using her phone at work and confiscates it. He then asks her to meet him after work. When she goes, Hae Jin asks her if she has anything scheduled after work or a boyfriend, which she answers to as neither. He then asks her to overwork with him, but they only eat dinner. Hae Jin leaves and Soo Jin tries to clean the office but finds photos of her. Those same pictures were in an envelope placed in her locker. Soo Jin is now scared and tried to run away. Someone starts following her and she suddenly meets a creepy perverted man in the elevator. He tells her that he was the one who took her pictures and starts stripping while taking her pictures. Hae Jin saves her and tells her he was watching over her after finding the photos. He then asks her to be his girlfriend. However, before they kiss, she is back in time. Her old boss then delivers an envelope to her.

While walking is a dark alleyway, Soo Jin is pulled by Ji Chang Wook, who is looking for the flash memory. He apologizes for getting her involved, but suddenly, a gun is raised to his head by a gang member, who claims that Chang Wook is a traitor and is actually a secret agent. Soo Jin is shocked to hear that she is also a secret agent. When the gang members attack them, Soo Jin helps Chang Wook and they escape to the safe house. There, Soo Jin treats Chang Wook's gunshot wound and asks him why he is doing this job. He tells her that it is his duty to protect and that he was her team leader at the agency back then. He also tells her that he fired her because he has feelings for her. He tries to leave but she follows him and asks him not to, and before he kisses her, she is back in time.