While the main leads break hearts, the Lee Hyun-kyu / Na Ji-na / Cha Joo-ik triangle reaches a boiling point. Ji-na finally begins to see the difference between her lingering feelings for her first love (Hyun-kyu) and the grounded, albeit complicated, support from Joo-ik.
The episode solidifies the tragic paradox of their contract: Doom at Your Service (2021) Episode 10
By the end of the episode, the two have essentially accepted their fate, choosing to spend their remaining days "loving until they disappear." The Secondary Love Triangle While the main leads break hearts, the Lee
For nine episodes, Tak Dong-kyung has maintained a stoic, almost detached facade regarding her terminal illness. In Episode 10, that wall finally crumbles. During a poignant rooftop scene, she finally stops trying to be "brave" for her brother and Myul Mang. She breaks down, admitting for the first time: This confession is the emotional catalyst the show had been building toward, humanizing her struggle beyond the fantasy stakes. Myul Mang’s Humanity In Episode 10, that wall finally crumbles
If she doesn't wish for the world to end, the person she loves most (Myul Mang) will die in her place.
Myul Mang (Doom) completes his transition from a nihilistic force of nature to a being capable of selfless love. He realizes that his existence—which he once hated—now has a singular purpose: to be the one Dong-kyung loves so that he can disappear to save her. His "birthday" wish to be human highlights his desperation to experience a normal life by her side, even if only for a moment. The Ultimate Sacrifice
The tenth episode of is often considered the emotional peak of the series, shifting from the supernatural "contract" to the raw, human fear of loss. The "I Want to Live" Moment