Doom At Your Service

Dong-kyung, a web novel editor with 6 years of experience, gets one day diagnosed with brain cancer which only allows her to live 100 days. She blames her unlucky life and wishes to curse everything to disappear, which unintentionally calls Myul Mang to her front door.

Dong-kyung makes a contract with Myul Mang for hundred days. However, she gets shocked to learn about the consequence she will face when she breaks the contract.

Dong-kyung, on an impulse, starts living with Myul Mang. Even in a very short distance of doom and death, Dong-kyung's life is still hectic and plain. Meanwhile, the female goddess approaches Dong-kyung to stop Myul Mang's plan.

Dong-kyung declares to kill Myul Mang becuase she loves him. She tries everything to love Myul Mang and such attempts bring Myul Mang to an unexpected situation.

Hardly can Myul Mang understand why Dong-kyung ran a risk to save him. Dong-kyung advises him to see and think like a 'human' and Myul Mang starts following her around.

After hearing Myul Mang's confession, Dong-kyung has a lot in her mind. To put her mind to rest, she makes an extraordinary plan. Meanwhile, Ji-na heads to an alumni meeting after seeing Joo-ik.

Myul Mang disappears after sharing a sad kiss with Dong-kyung. He realizes his cruel fate once again by the female goddess. By that, Dong-kyung gets shocked to hear what Myul Mang says.

Myul Mang meets Dong-kyung again. With the twist of fate, however, their happiness does not last long. Meanwhile, Joo-ik goes to Ji-na and the two runs into an unexpected person.

With the unexpected visit of Dong-kyung's aunt, Soo-ja, Dong-kyung and Myul Mang cannot live together for a while. While they enjoy their outdoor date, Hyun-gyu accidentally sees a message on Ji-na's phone sent by Joo-ik.

Dong-kyung gives an unexpected answer to Myul Mang's confession. Myul Mang feels that Dong-kyung seems to be somehow precarious. Meanwhile, Joo-ik tells Ji-na the stories he had been hiding.

Dong-kyung and Myul Mang spend a good time together at Jeju Island. But then, an unexpected person appeears in front of Myul Mang. Meanwhile, Ji-na writes a new novel with a new male character.

The traces of Myul Mang and Dong-kyung disappear entirely from each other's fate. While living their normal lives, the two runs into each other unexpectedly. Meanwhile, Ji-na and Hyun-gyu go on their first date and realize the gap between each other.

Myul Mang hovers around Dong-kyung to find out who she is. At the same time, Dong-kyung feels a strange sense of déjà vu. Meanwhile, Ji-na and Hyun-gyu go on their second date.

Miraculously, Dong-kyung and Myul Mang get to remember each other. Sadly, however, the day of fate arrives. Meanwhile, Hyun-gyu tells Joo-ik about his firm determination.

After Myul Mang disappears, Dong-kyung lives on with her beloved friends and family. But soon, she finds traces of Myul Mang in his house. Meanwhile, Ji-na cannot easily face Joo-ik for she needs some time.

Myul Mang finally becomes a human. He gets a new name, 'Kim Sa-ram', and lives a new life with Dong-kyung. What would their life be from now on?