ENDING SPOILER ALERT. I love this series. I have watched it several times. I may watch it again in the future. Even though I am reading English subtitles I find the acting to be worthy of 5 Stars. It's great. I believe that since I must read subtitles I notice more of the non-verbal acting. When watching movies or television in English I can keep up with the story without close attention to the screen 100% of the time. When I stream programs in languages which I neither speak nor understand I pay close attention bc I must read the English subtitles. The chemistry portrayed between the lead characters helped draw me into caring about the characters Good acting also helped led me to feel annoyed at a few of the characters. I could have easily given "Doom At Your Service" 5 Stars. I did not bc I found the ending incongruous with one of the main themes that ran through most of the episodes. The viewer is drawn into a strong, passionate love story between Tak Dong-kyung (Park Bo-young) and the deity Doom, Kim Sa-ram (Seo In-guk). It's a love that leads them to the point of making self-sacrifices. Kim Sa-ram makes the ultimate sacrifice so that Tak Dong-kyung can be healed from the cancer which is killing her. After Kim Sa-ram's demise Tak Dong-kyung mourns, weeps & yearns for him to be with her. After Sa-ram's return as a human Tak Dong-kyung is overjoyed. The story, however, takes an unexpected, incongruous turn in my mind. Tak Dong-kyung repeatedly rejects him when he wants to stay together overnight (something they had already done). Kim Sa-ram proposes marriage when the effects of cancer were at their worst for Tak Dong-kyung. After his demise & return as a human Kim Sa-ram repeatedly brings up the idea of forever staying by one another's side & marriage. Essentially Tak Dong-kyung was refusing to live together as well as refusing marriage. She teases but is unyielding. Kim Sa-ram pursued her while being rejected. It would have fit perfectly with the turn in the storyline if Tak Dong-kyung had suggested that Kim Sa-ram explore his newly found humanity by dating other women. The way in which Tak Dong-kyung kept emotional distance between them & the idea of her dating other men could have fit the turn which the storyline had taken. The closing scene brought some satisfaction to the viewing experience.