While the romance is the engine, My Demon is surprisingly philosophical.
Gu-won’s greatest curse is his immortality. He has seen everyone he ever cared for die. He cannot eat, sleep, or feel the warmth of a human touch without it burning. By losing his powers, he gains what he never had: vulnerability. He feels pain, cold, and hunger. He cries. He bleeds. The show argues that mortality isn’t a flaw but a gift. To be human is to be fragile, and to be fragile is to be capable of love. As Do-hee tells him, “You wanted to die because you couldn’t feel. But now you want to live because you can feel.” My Demon
The character of Jeong Gu-won embodies the classic "tempter" trope, but his evolution is the core of the series' philosophical inquiry. For centuries, he has lived on the fringes of humanity, viewing people only as transactional beings defined by their greed. His temporary loss of powers serves as a narrative catalyst for his humanization. As he begins to experience vulnerability, he is forced to confront the emotional weight of the souls he has harvested. This transition highlights a central theme: empathy is the primary distinction between a demon and a human. While the romance is the engine, My Demon