My Demon Review: Killer OST, Baby-Faced Demon, and Wasted Potential

Strong aesthetics and OST couldn’t distract from the rushed romance, obvious villain, and the demon who fell in love faster than you can say “contract.”

Korean Drama Name: 마이데몬 (My Demon)

Where To Watch: Netflix ← *Click for direct link*

Average Rating: 8.2/10 (MyDramaList)

My Rating: 5.5/10

One Sentence Description: A dark, supernatural romance, but delivered a baby-faced demon, predictable villain, and a full moon’s worth of missed potential.

Trailer:

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Disclaimer: This review is 100% my opinion — I’m not here to hate, just to share my thoughts! Also, SPOILERS AHEAD, so proceed with caution if you haven’t watched yet. Watch it, come back and let’s see if you agree. Let’s keep the discussion respectful and fun! 💕

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Simple Description

My Demon follows the strange love story between a powerful demon and a woman who accidentally ends up stealing all his powers.

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⚠️Length Note: This post includes a detailed (and long) story breakdown. Want to skip straight to the review? Jump to the Review

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The Review

The Good

OST for Days

Easily the best thing about this drama was the soundtrack. Specifically, the song “True.” I added it to my playlist and haven’t skipped it once, months later. Honestly, it was so good it bumped up my rating. Coming from a mid-tier drama like this? Unexpected. Disappointing that the soundtrack is better than the show, but I won’t pretend it didn’t sway me.

Her “Reliance” on Goo Won

Some people complained that Do Hee became weak once she started relying on Goo Won. I disagree. She was still capable and grounded, just not superhuman. He was literally a demon with teleportation powers and the ability to launch grown men across rooms. And she? She was a regular human dealing with a deranged serial killer and an entire company of people trying to sabotage her. Why would she not depend on him?

What exactly did people expect? hand-to-hand combat with psychos? Her leaning on Goo Won wasn’t weakness, it was logic. It made her realistic. You should also remember the fact that she was still handling grief, betrayal, business politics, and her own trauma while all this was going on. If Goo Won wasn’t there, this drama would’ve ended in episode 3. Let’s be for real. Hiding behind a guy who could literally bend reality isn’t a flaw, it’s called knowing your odds. 

Ga Young’s Character Development

Now this one surprised me. I didn’t expect to like Ga Young as much as I did by the end. At first, she felt like one of those obsessive side characters who can’t take a hint, and while I wouldn’t say she was annoying, she definitely gave second-lead energy in the worst way. But her character genuinely grew on me. She toned down the obsession, started thinking more rationally, and even formed a healthier relationship with Goo Won. Her development really landed when she helped another abused girl—completing her arc with something that felt honest and earned.

A few people found her annoying throughout the show but when you think about it, her actions are valid. Even during the height of her obsession, she was still one of the few people who made sense when it came to Goo Won. Her constantly reminding Do Hee that she was the problem? Valid. Her wanting Do Hee to die instead of Goo Won? Still valid.  Goo Won saved her from an abusive father (more or less), and Do Hee, at least in Ga Young’s eyes, was the reason Goo Won was losing everything. She didn’t owe Do Hee anything, and her willingness to sacrifice Do Hee for Goo Won’s survival came from a place of loyalty. It wasn’t villainous. It was real.

Honestly, she was one of the only characters who acted like someone who genuinely cared for Goo Won, not just romantically, but selflessly.

No Disrespect

One thing I have to applaud this show on was that it wasn’t a mockery to Christianity. With the name, I was prepared for disrespectful jokes left, right, and centre but there were none. I was ready to turn the show off at any point but it managed to tell the whole story without disrespecting Christianity and I couldn’t help but enjoy the show more because of it.

Regardless of your religion or beliefs, it’s never okay to disrespect someone else’s beliefs for entertainment regardless if you believe them or not. Seeing how easy it is for entertainment to do that nowadays, it was nice to know respect isn’t dead—  especially when they easily could have (considering). 

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The Bad

Goo Won Looked Way Too Cute to Be Scary

Let’s not lie, Song Kang is attractive. But not in the “hot, intimidating, soul-snatching, rip-your-heart-out” way. He’s attractive in the soft-boy, pretty-face, “are-you-wearing-tinted-lip-balm?” kind of way. At no point did I find him even remotely intimidating, and that really messed with the tone in moments that should’ve felt powerful or threatening.

Like, here he is about to drop a man off a rooftop, and all I could think was, “His face is so pretty.” Scene intensity? Gone. Mood? Ruined. All by the baby face. I even took a picture because of how cute he looked the whole show. Definitely not the reaction they were going for.

Do Hee Getting Mad at Goo Won for Doing His Literal Job

This always gets under my skin—when characters suddenly act shocked about things they’ve known since episode two. Do Hee knew Goo Won was a demon. She knew what his job entailed. So why the horror when she saw him collect a soul?

She married a soul-collecting demon with teleportation powers and an on-call hell portal but the second he acts like a demon, she’s shocked like he’s some stranger? Girl, you married him. Not only that, he had turned into an emotional puddle by that point anyway so she was the last person he’d ever hurt. That moment of fear just didn’t fit.

The Historical Romance Tie-In Felt Tacked On

Maybe it’s just me, but that whole historical storyline felt random. Yes, the Wolsim and Yi Sun arc was tragic and well-shot, but it ultimately added nothing to the actual plot. If Goo Won had remembered her from the past and been drawn to Do Hee because of it, maybe it would’ve worked. But as it stands, it felt like an afterthought, a pretty backstory with no real payoff. It just felt random and disconnected.

I wanted to enjoy it more, I really did. But without a meaningful connection to the present, it just became a beautifully tragic detour that didn’t go anywhere.

For a Demon, He Fell Hard and Fast

Let’s talk about the timeline. They fell in love in a month. Not exaggerating. One full moon to the next. The gas station fire? Marked their one-month anniversary.

This man had spent over 200 years making shady blood contracts and mocking humans, but suddenly he’s ready to give it all up for a woman he met four weeks ago? Please. That’s not eternal love, that’s emotionally impulsive behaviour with a supernatural backdrop.

This is where the historical flashback could’ve actually served a purpose. If he remembered Wolsim and that connection drew him to Do Hee, their quick relationship might’ve felt less ridiculous. But no. We’re left with a demon going full Romeo after a handful of hugs and shared trauma. The more you think about it, the flimsier the romance becomes. They’re ready to die for each other by week five. Be serious.

The Villain Reveal Was… Exactly What We Expected

One of the biggest letdowns of this show was the villain reveal or should I say, the lack of one. The villain was exactly who they hinted at from the beginning. Suk Min looked like the villain, acted like the villain, was built like the villain… and guess what? He was the villain. I kept waiting for a twist, something clever, some kind of misdirect. Most of us thought the villain was actually Seok Hoon but nope, the most evil-looking character really was just evil. That’s it. No subversion, no surprise.

This would’ve been such an easy way to add depth or surprise to the plot and they completely passed on it. It also would’ve been a great twist to see Seok Hoon as the villain, especially since that actor always plays the second lead who never gets the girl. Watching him step out of his usual role and into something darker could’ve been a refreshing change. But instead, he stayed in his boy-next-door lane the whole time. Charming sure, but also kind of boring.

Side Characters Were the Worst

Rom-coms need to stop making their side characters aggressively unfunny. I mean it. Every time those assistants popped on screen, I had to fast-forward like my sanity depended on it. Their “romance” was the kind of forced comedic relief that should’ve been left on the cutting room floor. It was all awkward slapstick and zero charm. Who decided that cringe equals comedy? It’s giving “we ran out of ideas so here’s a subplot nobody asked for.” 

And no shade (okay, maybe a little), but trying to label that energy “comedic relief” feels like a personal attack on viewers with taste.

No Room to Breathe After His “Death”

This one hurt. Genuinely one of the most disappointing final acts I’ve seen. They gave us this emotional gut punch, Goo Won dying for Do Hee, and then yanked it right back before we could even process it. I was still processing Do Hee’s breakdown, thinking, “Wow, she’s really killing this scene,” and boom — he’s back. No tension. No time to grieve. No breathing room, no grief arc, not even a full thirty seconds to pretend he was gone.

The last episode completely fell apart because of this. Her reaction to his death was strong—finally, some grounded emotion in a sea of melodrama. But bringing him back almost immediately erased all of that impact. He should’ve reappeared in the final minutes of the episode. Instead, they brought him back before the tear could even finish rolling.

“Do You Know You Have Thirty Minutes?”

This might fly under the radar, but it’s a valid point: the ending barely passes as “happy.” He comes back as a demon, aka immortal. She remains human. So unless they’ve got some secret plan, she’ll age and die while he lives on.

They could’ve easily adjusted this, make her immortal or him human. But as it stands, their sweet ending has an invisible countdown timer. If she makes a deal to extend her life, she’s going to hell. And we don’t even know if he exists there or just vanishes into sparkly oblivion.

It’s a lot of dramatic buildup for a love story that ends with one of them either grieving forever or roasting for eternity. A little more thought here and we could’ve had an ending that didn’t unravel the moment you used your brain.

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What I Would Do

Make the Historical Tie Matter

This one feels like a no-brainer given everything I already mentioned, but the historical connection would actually mean something. Instead of being a random, disconnected flashback, it would become the very reason Goo Won and Do Hee meet in the first place. When he sees Do Hee, it wouldn’t just be coincidence or fate working in the background. He’d save her in the water not because of plot convenience, but because she looks exactly like the woman he once loved and lost.

Eventually, he’d realize she’s not Wolsim at all. But by then, he’d already start caring. Maybe he sticks around out of guilt, maybe it’s fate pulling them together again. Either way, when Do Hee finally finds out that she reminded him of someone else, it would spark a powerful moment of vulnerability where he admits that yes, that’s how it started, but he’s staying because of who she is. Maybe he even became a demon as a way to punish himself for losing Wolsim, and seeing Do Hee gives him a reason to want to live again; not as a demon, but as a man.

Make the Villain a Real Surprise

And let’s be real, if we’re fixing things, Seok Hoon should’ve been the villain. Everyone suspected Suk Min from the start, and it made the entire mystery flat. Maybe if he’s jealous that Do Hee never had feelings for him, so he sets out to ruin her life. Or maybe he wants to get Goo Won out of the picture. Instead of trying to kill her outright, he’d focus on isolating her, making her lose everyone and everything so she’d have no choice but to turn to him.

It wouldn’t have felt disappointing because even though some suspected him, he still wore that “nice guy” smile the whole time. He would’ve been the last person Do Hee expected to betray her. Cold, quiet betrayal always hits harder than loud, obvious scheming. And it would’ve given his character an actual arc instead of being stuck in second-lead purgatory, yet again.

WAY Longer Than a Month

Let’s start with the obvious, everything about their romance happened way too fast. The full moon made a big symbolic entrance and then… nothing. We never even got an explanation of what it meant or what triggered the power transfer. And somehow, in the span of one lunar cycle, a centuries-old demon lost all his powers and gained a new life purpose? That timeline needs breathing room.

Also, it’s wild to me that Goo Won lost his super strong demon powers within a single month. For a demon who hasn’t loved or cared for humans in over 200 years, the love story felt way too rushed. He made it seem like the worst fate imaginable was becoming human and yet he was willing to become one for Do Hee after one kiss in the garden. Cute, sure, but not nearly enough to justify his big sacrifice.

So at minimum, we’d stretch the entire story over six months (with time skips to keep pacing tight but meaningful). That way, their dynamic would actually have time to grow. He’d start off trailing her because he thinks she’s Wolsim, but over time, he’d stay because he genuinely wants to be around her. And when they finally get together, that sweet reveal where he admits he always knew she wasn’t Wolsim? Heartbreakingly good.

As their relationship evolves, he’d begin to reconnect with humanity; not just through her, but through small moments. Little by little, he’d remember what it means to live. He’d start longing for a full, mortal life. Kids. Aging. All the things he once saw as limitations, he’d come to crave. That shift would justify his desire to give up his powers, not just because of her, but because he finally values life again.

Let Him Be Human

Let’s fix the part the writers seemed to forget: his immortality. He would come back not as a demon, but as a human. At first, I thought about making Do Hee immortal, but it just doesn’t match with the rest of the story or their lives. Goo Won becoming human makes more emotional and thematic sense.

Maybe while they were together, he began to appreciate the beauty in being mortal. The fragility of life. The fleeting moments that make time feel valuable. Do Hee would show him the beauty in mortality and remind him of what it felt like to live without knowing what comes next. He’d realize he misses it. He misses being human. So when the deity brings him back as human, it’s not just Do Hee’s wish that gets granted — it’s his too.

Make the Wish Clearer

Him coming back alive was confusing. The deity flat-out said she couldn’t interfere, and yet somehow, he just walks back into existence with a smile? I’d rewrite that deal entirely. Instead of some ambiguous tattoo-transfer clause, Goo Won would make a very clear deal: if he manages to reclaim the tattoo without either of them dying, then the deity owes them one fulfilled wish. That way, when he does come back, we understand exactly why. Do Hee wished for him to live, and he wished for a second chance; a life where he could walk beside her, not just protect her from the sidelines.

So yes, he’d still come back. But this time, he’d come back human. Not because of a vague magical loophole no one thought through, but because he chose to be, and because they both earned it.

Push His Return to the Final Scene

This was the biggest mood killer for me: how fast he came back after dying. So I’d change it completely. He wouldn’t return until the very end of the episode, months later. Imagine this:

Do Hee is absolutely devastated. She can’t function. She stops coming into work. Everyone around her talks about how much she’s suffering. Months pass, and slowly, she tries to put on a brave face. She comes back to the company, acts “fine” in front of Suk Min and others, claiming she’s moved on. But secretly, she hasn’t.

Then, after all that pretending, she returns to the river where they first connected. She opens up about how hard it’s been and how she just can’t move on. And just when she’s about to leave, Goo Won’s return unfolds in a slow, emotional, and unforgettable scene.

This would give us time to feel her grief and his absence, making the reunion so much more powerful.

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Final Thoughts

To wrap this up: this drama was overhyped, to say the least. When everyone started obsessing over it and the leads were giving runway-model energy, I really thought I was in for something great. I wasn’t.

On the bright side I’ll give them credit, it never felt like they were dragging it out just to hit the 16-episode mark. Aside from a few slow moments (usually their romance scenes), the pacing was decent. Add in the amazing OST and the chaos that was the Ga Young discourse, and I’ll admit, it was a fun drama to review.

But that’s about it. I even got bored writing the description because the drama itself just didn’t have anything exciting to hold onto. It wasn’t terrible, but it definitely didn’t deserve the level of hype it got. There were just too many cracks to ignore, and after a while, I got tired of pretending I couldn’t see them. Between the painfully obvious villain, the baby-faced “demon,” the plot holes, and that random historical twist no one asked for, enjoying this drama started to feel like a group project where only the OST showed up to work.

I know I sound harsh, so I’ll end with this: no disrespect to the actors or crew. I fully recognise the talent and effort behind the scenes (please don’t sue me 🙏).

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I’m surprised at how long this review ended up becoming. I feel like I may have come across a bit mean throughout the drama and I swear that was not my intention. This was my honest opinion and regardless of how much people love this (or other) dramas, I won’t tone down concerning that.

I want this blog be a place where we can be honest regardless of how much other people like it. So if you agree or disagree, all I ask is complete honesty. Keep in mind as honest as I am and want you to be, I won’t allow disrespect to the actors themselves in a hateful matter and not from the show alone. Keep that in mind. 🩵

Let me know your thoughts and I’ll see you next week. I think my next review is gonna be on one of the lowest rated shows I’ve ever rated. I had a lot of thoughts on that so be ready for another long review. Until then 💕

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