Doom at Your Service

A young woman who lost her parents at an early age is diagnosed with a brain tumour, forcing her to have less than 100 days to live. She prays for the destruction of the world, and the destruction himself comes to meet her.

Dong-gyeong survives the accident thanks to Myeol-mang but is shocked by the heavy consequences if she does not follow the contract; Dong-gyeong's ex-boyfriend starts to protest in front of her workplace.

Myeol-mang infers who Dong-gyeong loves the most after his presence in her house is discovered by Sun-gyung; when Dong-gyeong pays no mind to her limited life, Myeol-mang decides to experiment with other people.

In a desperate attempt to destroy Myeol-mang by winning him over, Dong-gyeong seeks the help of a romance expert.

Dong-gyeong throws herself at the criminal who attacks Myeol-mang with a knife. Myeol-mang, surprised by her action, kills the criminal. He then asks Dong-gyeong to love him so he can die peacefully.

Dong-gyeong and Myeol-mang share an intimate moment in the rain; Ji-na decides to attend the high school reunion hoping to see an old flame.