My Demon surprised me with how well they managed to do a romance drama while still keeping the fantasy elements all the way through, and keeping an entertaining storyline. I will say that most of the twists were fairly predictable, but even still the story itself was very enjoyable to watch.

Jung Gu-won (Song Kang) plays a demon who makes deals with people in exchange for their soul. Additionally, he has powers that essentially make him invincible. Do Do-hee (Kim Yoo-jung) is the CEO's favorite potential successor of Mirae group, though she's the only non-blood related candidate. This naturally creates tension within the family of this corporation, and the lengths to which the other family members are willing to go to in order to destroy Do-hee become clear as the story progresses. When a twist of fate bring Gu-won and Do-hee together, they both reluctantly become reliant on each other, which leads to unexpected romance between them.

Overall, a great fantasy romance. They somehow managed to hit every romance trope and still pull off each one. The actors have great chemistry together, and the development of the relationship is well-paced and fun to watch.