S Line

The ending lost me

the concept of this show is good and the 5 episodes are great with good plot to keep u on the edge of your seat. but they just completely give up on everything in the last episode. was it supposed to be a cult thing???? is this show trying to convey that ppl put too much on sex/are ashamed of sex?? or are they trying to show it as a bad thing and people who do it should be removed from the world???
maybe it could be just bait for a 2nd season

the cases and the connection to the lines was interesting and i love that the victims/perpetuators are connected. they should have kept that going

lee soohyuck looked amazing (as always)

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The writers surely didn't know what kind of story they wanted

There’s been a lot of chatter about this drama online—and honestly, the premise itself had me intrigued because of how bizarre it sounded. But watching it? I was left baffled. This drama didn’t just lose its footing—it literally switched genres halfway through, like it forgot what story it was even trying to tell.

The characters didn’t help either. Most of them were forgettable and written off without closure (what even happened to the teacher who was leaving for Canada? His sister? The bully girl who stole the glasses?). The only remotely interesting ones were Hyeon-hup—though “barely tolerable” is putting it nicely—and Detective Ham Ji-uk, who at least carried some weight in the mess.

What frustrated me most was the wasted potential. At first, I thought this show would dive into how sex and society are interwoven: how people’s choices—cheating, betrayal, predatory behavior—impact not just themselves but the people around them. Or maybe even a psychological crime-mystery angle exploring where these mysterious “lines” came from. Personally, I think it would have been far more compelling if there had been no origin at all—if only Hyeon-hup could see them, and the glasses simply revealed what was invisible to others.

Since the drama is rooted in Korean views on sex and “purity,” I could at least *understand* where some of the morality was coming from, even if I didn’t agree with it. But the execution? Total chaos.

The first five episodes were solid enough, and I even enjoyed watching Hyeon-hup’s growth. But then the teacher suddenly starts planting murderous thoughts in people’s heads and decides to sacrifice them—only to die in the most nonsensical, logic-defying way possible, with Hyeon-hup resurrecting (?) and killing her. At that point, I couldn’t help but roll my eyes. It felt like the writers just gave up and tossed darts at a wall of random plot twists.

This show could have been so much more—a gritty exploration of morality, crime, and society’s relationship with sex. Imagine if the teacher had been written as a natural-born “seer” of lines like Hyeon-hup, twisted in her own way. That would have been interesting. Instead, what we got was a mess of abandoned storylines, rushed reveals, and an ending that insulted the intelligence of anyone still watching.

So, unless you’re fine with watching a promising idea crash and burn, I’d suggest skipping this one. The first few episodes may hook you, but the downfall isn’t worth the frustration.

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Diminished Potential

I don't usually write reviews, in fact this is my first one, but this drama left me in such shock that even a day later I feel the need to write about it.

Now, amazing story concept, good acting, interesting plot until...WHAT was that ending?? Where did it come from? This truly felt like the writers realized they had to wrap things up soon but didn't know how to, so they picked the unrelated fantasy option where they don't have to explain anything anymore. The sudden reality shifts, cultist sacrifices, and power hungry god were all introduced in the LAST EPISODE without any hints to it before then??

I had a lot of hope for the show and it really hooked me, especially when we found out the teacher was the one distributing the glasses, but all of that potential crashed and burned in that last episode.

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Incredible idea, wasted potential, Overhyped and Underwhelming.

I was all in for S‑Line seeing red strings of past sexual encounters felt wild, fresh, and exactly the kind of premise that could change the game. The visuals of the red lines crawling over his head were instantly iconic, became an instant meme paranoia at its best. and the show’s atmosphere and music were top‑tier. But after a strong start, the story quickly unraveled. What could have been a razor‑sharp thriller about shame, secrets, and surveillance became a messy mix of supernatural twists, rushed subplots, and a finale that abandoned its own serial‑killer tension for an odd dystopian turn. I really didn’t like the ending it felt dystopian and weird, but not in a good way, leaving me more frustrated than shocked. The characters, while intriguing especially Arin’s haunting performance and Lee Eun‑Saem’s unpredictable arc never got the depth they deserved, and by the last episodes the red‑line concept had lost its symbolic bite, reduced to a flashy gimmick instead of a meaningful commentary. It’s a show worth watching once for the cast and visuals, but in the end, the hype far outweighed the substance. Not unwatchable, but definitely overhyped. With the themes it tried to tackle, this could have been powerful instead, it ended up just… fine.

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Open letter to the production team

📢 Open Letter to the S Line Team

Dear S Line Writers, Producers, and Wavve Team,

First of all, I want to say thank you for creating S Line. The concept was fresh, bold, and unlike anything we’ve seen in a K‑drama before. The red line idea was fascinating and had so much potential — it made me and so many other fans excited to tune in every week.

But as much as we loved the idea, we also need to be honest: the execution left us disappointed.

The last two episodes felt rushed and disconnected from the first four. The story suddenly shifted into confusing supernatural elements, and big moments — like Jun‑seon’s sudden death — felt unnecessary and poorly handled. It wasn’t just the fact that he died, but how his death was treated. There was almost no time for grief, no space for the weight of that loss, and it made the story feel hollow instead of heartbreaking.

Here’s what fans are asking for if there is a Season 2 (and we hope there is one!):
✅ Answer the questions you raised. Don’t leave the mysteries hanging with no explanation.
✅ Stop using unnecessary, out‑of‑nowhere deaths just for shock value. If a character dies, make it matter — and show real grief.
✅ Respect the emotional core of the story. Hyuno and Jun‑seon’s connection felt like soulmates. If you’re going to break hearts, do it in a way that feels earned.
✅ Stick to the concept you started with. The red line premise was enough. You don’t need random multiverse twists and unexplained supernatural moments to make it interesting.

We’re not saying this out of hate — we’re saying it because we care. We believed in S Line’s potential, and we still do. That’s why we’re asking you to listen to your fans and make Season 2 (and any future episodes) the best version of this drama it can be.

Sincerely,
A very frustrated but hopeful fan

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Intriguing but lost

Started the drama like everyone else to see the case live up to their potential. The drama was way too short. Story line missed around 50 pages in between. The first 2 episodes were slow and good and to be honest we were curious and rushed to watch the rest. They didn't elaborate with the concept of revealing in the next season maybe? I mean you can't end a drama with literally no context.. because the ending was definitely not a cliffhanger.

I have no words for the acting because there literally was nothing to see. So, if you just want to start this drama out of curiosity from reels, you can... but omy ill you be disappointed.

This is just an honest opinion from a Kdrama buff, no allegations :)

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Was I anticipating every Friday for no reason?

The first 4 episodes really had me intrigued, to see how the plots will unravel, and oh was I disappointed. Do not get me wrong, the casting was good, the acting impressed me as well - but what were those plots?! If you have not watched yet and planning to, get prepared to be confused!

I agree with many reviews that it was rushed. Everything was just thrown at me all at once (spoilers ahead), especially at the end where everyone was around the homeroom teacher and Hyeonhop. I really thought I wasn’t paying attention because what even was that?

The death I found so unnecessary was Hyeonhop’s boyfriend. I thought maybe their trope could be on the sideline, away from the main plot, but I was wrong. Yeah, there was mystery laced throughout the episodes, but I wish they delved into situations more rather than leaving it mid-catastrophe then moving on to another. Would I watch if there is another season? Yes, only because I’d like to see how they can continue the storyline after that ending, but I’ll watch it without getting my hopes up.

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captivating, interesting, WILL keep you seated

bro im TELLING you kdramas with 6 episodes or 8 are always the best. Short kdramas give you just enough and leave you wanting more, its so frustrating!!!

the ending made it seem like there’s going to be a season 2 (i certainly hope so).

everything was just so good. i have nothing to complain about, it was interesting and entertaining and every episode had me curious and awaiting the next episode. i’m so sad a kdrama with this much of an interesting plot might be discontinued. although there isn’t much for them to do in season 2 since every conflict is basically finished, i really did wish we got to see the aftermath a bit more.

really good kdrama! i was invested!!

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Brisk with room for more

The concept of the series revolves around the different type of sexual relations, from the positive to the heinous crimes that human beings engage in along with a supernatural twist, the fantasy aspect of which comes to a full boil that leaves the possibilities of more story to be told to explore the lore, and the interpersonal impact on the world after the events of the final episode.

The entity that masterminded the events to unfold is fascinating with the further powerset they have that is revealed. The series kinda waffles between sex positivity and slut shaming the detective for humor. I like that they showed Hyeon Hop getting to experience safe, consensual sex, with someone her own age without exploitative scenes. I do hope there will be another season, but the parent channel seems to often end shows this way and I haven't seen second seasons happening yet.

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Interesting until it wasn’t

First four episodes were interesting. That’s what gets most people to keep watching. The scene at the motel was disturbing.. was she having s*x w a dying/ dead man? How did he die.. I have no idea.. last episode was terrible. They suddenly entered a paranormal world- offering to kill human sacrifice , FL had to die so the world could see what she could see. Nonsensical

It’s short, only 6 eps. Good thing;) kinda sad what happened to the first bf she ever had. Highly not recommended to watch. Go to Cdramas instead- The Prisoner of Beauty is an excellent watch!

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Too many red lines TOO little S*x

The premise of the story seemed quite interesting to be honest. The first few episodes were like WOW can’t wait to see where the story goes and then it went and it went and it went to… SHIT.

A potentially great story that never delivers. If you tell me that the ML has so many lines, i want to see the proof hehehehe all he did was work and drive everywhere, how, where and with who did he acquire those lines??? that was my main question and not because I’m being naughty, but that’s the freaking name of the series. The two mains had chemistry and that wasn’t explored. What a shame!!! When I read the comments where viewers were ripping apart that last episode I honestly thought that they were exaggerating, but to my surprise those mean spirited comments fell short of how bad the ending was. That last episode was EPIC and should receive an award. I don’t think I’ve seen anything like it and, to be honest, I’ve seen a good share of cheese terrible endings, but this one is on a category of its own. I applaud the actors for shooting it without dropping out of the project. When I think about it can’t stop laughing i’m still trying to recover from whatever that was HAHAHAHAHAHA

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started off as a potential peak drama but fell off

the drama started off so well. SO WELL. the story was so intriguing and overall interesting. The first five episode were absolutely amazing, GREAT but they fell off with the sixth episode. Also the teacher being the opp wasn’t even a surprise as those who have watched the drama would understand. the first few episodes had great writing and production, so much so that it was worth waiting for the episodes to come out but they kinda ended the drama on a ‘cliche’ typa shit on the last episode. It seemed like they just kind of wrote the ending on a whim or got a thirteen year old to write it. Overall it was good but the last episode really disappointed me and I feel like the last episode is swaying me from actually appreciating the episodes throughout but it is what it is. :)

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