LTNS (2024) official poster
📺 K-Drama Guide · Black Comedy · Romance

LTNS

엘티엔에스 (Long Time No Sex) · 2024
✅ Completed · 6 eps
🎬 TVING · Viki
⭐ 7.3 / 10 MDL
🔞 NC-17
⚡ Updated · Jun 02, 2026

📋 Drama Overview

LTNS (2024) official poster
Completed
🔥 TVING Original
LTNS (Long Time No Sex)
엘티엔에스 (Elti-en-eseu) · 2024 · South Korea
WriterLim Dae-hyung · Jeon Go-woon
DirectorLim Dae-hyung · Jeon Go-woon
Episodes6 eps · ~56 min each
⏱️ Binge Time5h 36m
AiredJan 19 – Feb 1, 2024
GenreBlack Comedy · Drama · Romance
Content Rating18+ Restricted (NC-17)

TVING
Viki
VIU
Sexless Marriage
Blackmail
Infidelity
Married Couple
Black Comedy
TVING Original

Woo Jin (Esom) and Samuel (Ahn Jae-hong) are a sexless, estranged married couple whose romantic spark has faded after seven years together. Woo Jin works as a hotel receptionist; Samuel drives a taxi after leaving his corporate job due to mental health struggles. Their days move in parallel — polite, functional, utterly empty of the thing that once held them together.

When they accidentally discover that Samuel’s friend Jung Soo is having an affair, the two do something unexpected: they decide to use it. Targeting cheating couples — gathering evidence, collecting payments, staying anonymous — becomes their strange new side business. But as they spend more time surveilling other people’s forbidden relationships, something shifts. Every couple they follow holds up a mirror. The more they expose other people’s secrets, the harder it becomes to ignore their own.

Episode Progress
6 / 6 ✅ Completed

⚡ Quick Verdict

One box. Everything you need to decide.

⭐ Worth it?YES — if the NC-17 rating doesn’t scare you
⏱️ CommitmentMedium — ~5.5 hours total
💛 VibeBittersweet · Darkly Funny · Uncomfortably Real
📺 Skip if…You want a feel-good romance with a clean ending

⭐ 7.3 / 10
· MDL Score

▶ Official Trailer

🎭 Cast & Characters

The two leads carry this show on their backs — and everyone around them makes the chaos feel lived-in.

Esom as Woo Jin in LTNS (2024)
Esom
Woo Jin

Lead

Ahn Jae-hong as Lim Park Samuel in LTNS (2024)
Ahn Jae-hong
Lim Park Samuel

Lead

Jang Yo-hoon as Jun-ho in LTNS (2024)
Jang Yo-hoon
Jun-ho

Supporting

Ok Ja-yeon as Jung Min-soo in LTNS (2024)
Ok Ja-yeon
Jung Min-soo

Supporting

Ki Joo-bong as Samuel's father in LTNS (2024)
Ki Joo-bong
Samuel’s Father

Supporting

Kang Jin-ah as Woo Jung-ah in LTNS (2024)
Kang Jin-ah
Woo Jung-ah

Supporting

Lee Yoon-jae as Prosecutor in LTNS (2024)
Lee Yoon-jae
Prosecutor

Supporting

Lee Hak-ju as Jung-soo in LTNS (2024)
Lee Hak-ju
Jung-soo

Supporting

Kim Sae-byuk as Se-yeon in LTNS (2024)
Kim Sae-byuk
Se-yeon

Supporting

Park Joo-young as Gangwonland in LTNS (2024)
Park Joo-young
Gangwonland

Supporting

Kim Keum-soon as Eun-mi in LTNS (2024)
Kim Keum-soon
Eun-mi

Supporting

Kim Ja-young as Hotel Guest in LTNS (2024)
Kim Ja-young
Hotel Guest

Supporting

🍿 Where to Watch

Stream LTNS on these platforms.

📺 Episode Guide

Spoiler-light recaps — enough to remember where you left off, nothing that ruins the ride.

LTNS Episode 1 — Seven Years of Silence
EP 01
Seven Years of Silence
January 19, 2024 · TVING
We meet Woo Jin and Samuel through what they no longer do. A sharp flashback shows the couple they used to be — passionate, physical, alive together. Then seven years hit like a wall. Samuel discovers his friend Jung Soo’s affair almost by accident, and when Woo Jin insists on confronting it rather than ignoring it, a door opens. The episode’s final beat — the two of them staring at each other across the idea of blackmail — is both funny and quietly devastating.

LTNS Episode 2 — The Business of Secrets
EP 02
The Business of Secrets
January 19, 2024 · TVING
Woo Jin and Samuel formalize their operation — she scouts from the hotel front desk, he tails targets in his cab. Their first proper score goes surprisingly smoothly, which is part of the joke: these two can coordinate beautifully for criminal enterprise but can’t manage a single honest conversation at home. The comedic mechanics of the blackmail setup are irresistible, and the episode leans into the absurdity without losing the melancholy underneath.

LTNS Episode 3 — Mountains and Coastlines
EP 03
Mountains and Coastlines
January 26, 2024 · TVING
A new target — an older man checking into Woo Jin’s hotel with someone who is decidedly not his wife — takes the couple on an unlikely surveillance trip through the mountains and down to the coast. Chasing someone else’s affair turns into something resembling a road trip, and the show exploits the irony carefully: Woo Jin and Samuel are more present with each other than they’ve been in years, and the reason is that they’re spying on strangers.

LTNS Episode 4 — Fire Watching
EP 04
Fire Watching
January 26, 2024 · TVING
A couple gets into Samuel’s cab and fills it with the kind of heat he and Woo Jin haven’t felt in years. Watching two people be desperately, recklessly in love — even if what they’re doing is wrong — does something to both of them. The episode sits with the irony rather than rushing past it: two people who profit from other couples’ combustion, now singed by proximity to a flame they thought they’d lost completely.

LTNS Episode 5 — The Lie in the Bed
EP 05
The Lie in the Bed
February 1, 2024 · TVING
Woo Jin goes to the hospital and finds Samuel’s bed empty. He’s with Min Soo, a neighbor. She calls him. He lies. And just like that, the person who has been half-heartedly running a blackmail operation against cheating couples becomes convinced she’s married to one. The episode shifts the show’s register noticeably — less comedy, more a tightening knot — as Woo Jin tails Samuel with the same cold competence she’s been applying to strangers.

LTNS Episode 6 — Long Time No Sex
EP 06
Long Time No Sex
February 1, 2024 · TVING
Woo Jin tries to blackmail the woman next door. Samuel stops it — because he has something to confess first. What follows is a confrontation two years in the making: he saw her. With her ex-boyfriend. And he never said a word. The fight is volcanic, the divorce is swift, and seven months of separate lives stretch out in a few minutes of quiet screen time. Then it’s Christmas Eve. Then there’s a knock at the door.

🏁 Ending Explained

Full spoilers ahead — everything that happens in the finale and what it all means.

⚠️
Spoiler Warning — This section covers the full finale of LTNS. Stop here if you haven’t finished the series.

The confrontation that was always coming. Woo Jin has convinced herself that Samuel is having an affair with their neighbor Min Soo. She’s wrong — but the lie he told when she called him has given her every reason to believe it. When she tries to blackmail Min Soo using the same cold mechanics she’s been applying to strangers for weeks, Samuel stops her mid-confrontation and pulls the floor out from under everything. He wasn’t cheating. But she was. Two years ago, with her ex-boyfriend. He saw it. He never said a word. He just stayed.

LTNS (2024) Episode 5 — The Lie in the Bed

The marriage ends — and both of them feel the loss. The fight after Samuel’s confession is the most raw the show ever gets. Two years of swallowed knowledge on his side, two years of guilt she’d buried deep enough to forget on hers — it all surfaces at once, and neither of them can make it survivable. They divorce. They move into separate spaces. The show gives us seven months of this in compressed time: two people going through the motions of their respective lives, the absence of the other pressing in from every edge.

What the blackmail plot was really about all along. It’s easy to read LTNS as a dark comedy about infidelity and money. But the finale reframes what the whole enterprise was actually doing: every cheating couple Woo Jin and Samuel investigated was a version of them. The couple in the mountains were keeping secrets that cost more than they’d planned. The passengers in Samuel’s cab were burning with something real that wouldn’t last. The blackmail business forced two avoidant people to become forensic about intimacy — other people’s — until they couldn’t avoid their own anymore.

LTNS (2024) Episode 1 — Seven Years of Silence

Christmas Eve, a knock, and the ending they earned. Samuel shows up at Woo Jin’s door on Christmas Eve. No grand speech. They apologize — both of them, without one being more to blame than the other — and they find each other again in the most literal terms the show’s title allows. The finale doesn’t pretend the seven years of drift never happened, or that a single night fixes everything. It lands exactly where it should: two imperfect people who chose each other badly for a long time, finally choosing each other right. LTNS earns its reconciliation not by erasing what broke the marriage but by making both of them look at it clearly for the first time.

✍️ KDramaWorlds Editor’s Take

Our honest read on why this drama is worth your time — and who it’s for.

💔 Broken Marriage Energy😂 Dark Comedy🕵️ Amateur Criminals💋 Slow Rekindling🌙 Late-Night Binge

LTNS arrives with a title that functions as both setup and punchline, and it earns both. This is a show about what happens inside a marriage when the physical intimacy disappears — not with drama, not with a single terrible event, but quietly, incrementally, until two people are sharing a life without actually sharing anything. Esom and Ahn Jae-hong are extraordinary in this: they play Woo Jin and Samuel as people who still fundamentally know each other but have forgotten how to reach across the gap. The blackmail conceit is absurdist on paper and strangely moving in practice, because the show understands that sometimes it takes watching other people be completely reckless with love to remember why it matters.

LTNS (2024) — cinematic still

The co-directors — Lim Dae-hyung and Jeon Go-woon, who also wrote the script — bring an indie sensibility that’s genuinely rare in K-drama. Scenes breathe differently here. Conversations stop and start the way real conversations do. The comedy never feels performed; it emerges from the situation with the particular awkwardness of two adults behaving in ways they know are slightly unhinged. What the show is less confident about is its pacing in the final stretch. Episode 5 raises the emotional stakes beautifully, and then episode 6 has to land a two-year time jump, a volcanic confrontation, a divorce, seven months of separation, and a reconciliation in under an hour. It gets there — but just barely, and with less room to breathe than the material deserves. The comparison to Thirty-Nine (2022) isn’t exact, but both shows share an interest in adult lives lived at the wrong frequency — people who have drifted from what matters and have to find their way back through difficulty.

The NC-17 rating is real, and so is the reason for it — LTNS treats adult intimacy with the same frank directness it applies to everything else, and some of that is explicit. If that’s outside your comfort zone, the rating is an honest signal. But if you go in prepared, what you’ll find is a six-episode drama that’s warmer than its premise suggests, funnier than its tone warns, and more emotionally precise than its runtime should allow. LTNS is a small drama that does something genuinely difficult: it makes a dysfunctional marriage feel worth rooting for without ever pretending the dysfunction wasn’t real.

👍👍👍 BEST FOR 👍👍👍
💑 Viewers who want a mature, unsentimental take on long-term relationships
😂 Fans of dark comedy that finds genuine warmth inside the chaos
⏱️ Anyone who wants a complete, satisfying story in under 6 hours

⚖️ Final Verdict
What works
Esom and Ahn Jae-hong’s chemistry — lived-in, frayed, and entirely believable
Black comedy that never lets the laughs erase the emotional weight
Compact runtime — 6 episodes with zero wasted scenes
Directing duo brings an indie film sensibility that elevates every scene

What to know first
NC-17 rating is accurate — explicit content is part of the storytelling, not incidental
Episode 6 rushes a reconciliation that needed more room
The blackmail subplot is a vehicle, not the point — don’t expect a tense crime drama
Limited availability outside of Viki and Viu — may require a subscription

7.3 / 10Watch it — just go in knowing it’s a grown-up drama that means exactly what its title says.

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