S Line Episodes 5-6 (finale): Release date news, streaming details, and more

The latest and dark Korean fantasy thriller, S Line, is turning heads for all the right and surprising reasons. Set in a world where red glowing lines mysteriously connect people who have had sexual relationships, the drama dives into the hidden desires and shame that unravel in public.

The K-drama debuted on July 11, 2025, and has since become a topic of discussion, notably on social media platforms. It's a short six-episode series, with four episodes already available to stream.

The final two chapters, S Line Episodes 5 and 6, are set to release tomorrow, July 25, 2025. They will be available on Wavve, the official streaming platform for his hit Korean thriller.

So, what exactly is the plot? Well, it is about red lines on people's heads, which reveal how many times a person has been intimate. And no one would ever want such private details out in the open, but those red lines expose everything.

They reveal who’s been with whom, whether you like it or not. And the only ones who can see these S (s*x) lines are the people wearing a strange pair of glasses.

Curious to know more? Keep reading below!

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S Line Episodes 5-6 (finale): Everything to know

Episodes 5 and 6 of S Line, the last two episodes of the show, will be released together on Friday, July 25, 2025. The official release time in South Korea is 11:00 a.m. KST.

The only official and legal way to stream the S Line finale is through Wavve, the streaming service based in South Korea. Wavve offers English subtitles, so even non-Korean speakers can watch and understand the episodes easily.

Additionally, episodes 1 to 4 have been unofficially uploaded on DailyMotion, complete with English subtitles. So, it is likely that episodes 5 and 6 might appear there too, although that is not guaranteed. But if you are aiming for the best video quality and to support the creators, Wavve is the recommended option.

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What happened in S Line Episode 3-4: A quick recap

S Line Episode 3 opens with the aftermath of Seon‑a’s rooftop collapse: She has survived, but it is no accident. Hyun‑heup insists she didn’t jump, prompting Detective Ji‑uk to quietly dig deeper into the case. In school, the atmosphere tightens as faculty scramble for cover.

Meanwhile, the mysterious pair of glasses that Seon-a wore was found by a male teacher named Jung-woo at the school. He is shocked to see the red lines above everyone's head except Lee Gyu-jin. Jung-woo then uses the glasses to spy on his brother-in-law.

He found him cheating and even learned that his second wife is pregnant. But the truth is: the glasses don't tell him the full story that Jung-woo's sister is the second woman, not the one he thought.

Later, the language teacher who pushed Seon-a turns up dead, and Ji‑uk suspects foul play and moves the evidence. Then, in the S Line in Episode 4, the focus shifts to Mi‑sung, the shy administrative staff member who aspires to act.

She starts wearing gold‑rimmed glasses too, using them to navigate motel bookings where she practices dialogues in private. Obsessed with the hidden secrets being exposed, she crosses a dark line: Mi-sung ended up killing a man due to her obsession and confusion.

By the end of the episode, Ji‑uk finally tries the glasses himself and sees his head crowded by red lines: A shocking revelation that validates Hyun‑heup’s warnings. He confronts her at a closed pool, and she confirms that each line represents someone’s past s*xual partner and counts.

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What to expect from S Line Episode 5-6?

In S Line Episodes 5 and 6, Detective Han Ji-wook investigates a disturbing r*pe case involving a minor who strangely denies the assault. To uncover the truth, he turns to the red-line glasses, which reveal supernatural clues invisible to others.

These episodes focus on how he uses this tool to chase justice. The case becomes the emotional center of the final chapter. Tension rises when the red-line glasses fall into the wrong hands once again. With their power, someone may use them for revenge, control, or even murder.

The final episodes also promise long-awaited answers. The origin of the mysterious glasses will finally be revealed, along with the killer behind Shin Hyun-Heup’s niece’s death.

So, don't miss out on the S Line finale, arriving tomorrow.

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