The 2025 K-drama landscape has been packed with bold, boundary-pushing stories, but few have sparked as much debate and social media frenzy as S Line. This dark fantasy thriller, which wrapped its six-episode run in just two weeks, left viewers reeling with its provocative premise, stunning visuals, and a finale that feels more like a setup than a conclusion. Based on the Naver webtoon by kkomabi, the series explores themes of sexual privacy, shame, and vengeance through a supernatural lens—red “S Lines” that reveal past intimate connections. But with the credits rolling on that crimson sky and Kyu-jin’s eerie return, one question dominates fan forums: Is S Line coming back for Season 2? Here’s everything we know so far.
What Was S Line About?
For anyone late to the party, S Line drops viewers into a near-future Seoul where “S Lines”—those eerie crimson threads—link people who’ve shared intimate moments. Shin Hyun-heup (played with heartbreaking vulnerability by Arin of Oh My Girl) has always seen them, a “gift” that’s isolated her since childhood, turning family tragedies into personal hauntings. Enter Han Ji-wook (Lee Soo-hyuk, all brooding charm and sharp instincts), a detective whose casual vibe crumbles when he slips on a pair of mysterious glasses and spots a tangle of lines sprouting from his own head.
Then there’s Lee Kyung-jin (Lee Da-hee, serving enigmatic teacher vibes), the woman at the center of it all, distributing those glasses like forbidden fruit and sparking a wave of vengeance. What starts as a gritty crime probe spirals into something supernatural, exposing cults, betrayals, and a society unraveling under the weight of its own exposed underbelly. Directed and written by Ahn Joo-young, the show pulls no punches, blending dark fantasy with raw emotional punches. It streamed exclusively on Wavve in South Korea, with international fans snapping it up on platforms like Viki and Kocowa.
The series wrapped after just six episodes, leaving tastes for more. And that ending? Oh boy. Without spoiling too much, Hyun-heup’s desperate stab at freedom unleashes chaos on a global scale, painting the sky red and hinting at a world where no one’s secrets stay buried. Kyung-jin’s fate hangs in the balance, her voice echoing like a promise—or a threat. It’s the kind of cliffhanger that screams “prequel setup,” especially since the show draws from kkomabi’s 2010 Naver webtoon, where the lines are already common knowledge from page one.
Is S Line Season 2 Happening?
As of late November 2025, Wavve hasn’t dropped any official word on a second season. The streaming giant, known for greenlighting edgy originals, stayed mum even as viewership numbers climbed. Industry watchers point to the packed schedules of stars like Lee Soo-hyuk (fresh off Blood Free) and Lee Da-hee (eyeing more lead roles), suggesting the window for quick turnaround might be closing. One report even predicts no renewal, citing the talent’s likely jump to bigger projects.
