Episode 1
After having the worst day of her life, Tak Dong-gyeong wishes for the world to end. A stranger shows up at her door to make that desire a reality.
Episode 2
Dong-gyeong realizes that the hundred-day pact with Myeol-mang comes with heavy consequences if she refuses to fulfill her end of the bargain.
Episode 3
As Dong-gyeong deals with a demanding new roommate, she looks for a loophole in her agreement with Myeol-mang to save her loved ones from doom.
Episode 4
In a desperate attempt to destroy Myeol-mang by winning him over, Dong-gyeong seeks the help of a romance expert.
Episode 5
Puzzled by Dong-gyeong's act of self-sacrifice, Myeol-mang decides to keep close tabs on her to figure out her true intentions.
Episode 6
Dong-gyeong looks for another subject to fall in love with. Na Ji-na attends a high school reunion hoping to see an old flame.
Episode 7
Myeol-mang comes to a difficult decision after being reminded of the part he played in bringing grief and sadness into Dong-gyeong's life.
Episode 8
After a short-lived reunion, Dong-gyeong has her love and trust in Myeol-mang tested while he navigates a world where she never existed.
Episode 9
Lee Hyeon-gyu shows up at Ji-na’s door to get something off his chest. Dong-gyeong goes on a shopping spree to prepare for a final goodbye.
Episode 10
Myeol-mang makes a heartfelt confession. A writer accuses Ji-na of plagiarism. Dong-gyeong makes a painful choice to save her loved ones.
Episode 11
After spending time with good company, Dong-gyeong returns to her old life while Myeol-mang finds himself transformed. Ji-na works on a new series.
Episode 12
Myeol-mang punishes criminals who run free. Dong-gyeong meets a ghost at the hospital. Ji-na and Hyeon-gyu feel a growing distance between them.
Episode 13
Myeol-mang keeps an eye on Dong-gyeong hoping to figure out who she is. Ji-na clears the air with Hyeon-gyu but makes up her mind to move on.
Episode 14
After promising a life together, Myeol-mang and Dong-gyeong make the most of the time they have left.
Episode 15
Upon receiving a second chance, Dong-gyeong moves forward with her life, while holding on tightly to the memories of her past.
Episode 16
Having found the person to spend the rest of her life with, Dong-gyeong finds hope and meaning for the future.
