S Line

TV series

S Line

7.5/ 10· 17020251 season · 6 episodes

Social. Sex. Secrets.

A young woman with the ability to see mysterious red connections between lovers discovers her secret gift is no longer unique when special glasses granting similar powers appear on the black market.

Created by
Ahn Joo-Young

Seasons and episodes

1 season · 6 episodes

Ended
Miniseries

Miniseries

6 episodesJuly 11, 2025
Open season page

Hyeon-heup has been able to see the mysterious 'S lines' since birth, a secret only she could perceive. But when special glasses allow others to see it too, long-buried secrets and hidden connections surface, pulling her into a web of desir

  1. S1 E1

    The Girl With The Sunglasses

    Jul 11, 202551 min

    Hyun-heup, a girl who was born with the ability to see the S-line that indicates sexual relations. Because of this ability, Hyun-heup's family faces tragedy, and Hyun-heup becomes a reclusive loner for a long time. Then one day, a series of

  2. S1 E2

    The Animal Kingdom

    Jul 11, 202551 min

    Hyun-heup goes to Bangju High School after receiving a mysterious text message. There, he reunites with Seon-ah, a middle school classmate and Ji-wook's niece. However, Seon-ah is a victim of bullying from bullies. One day, when the bullyin

  3. S1 E3

    A Fall Into Darkness

    Jul 18, 202557 min

    Seon-ah falls from the rooftop and falls into a coma. Ji-wook cries out in self-reproach and anger, and cooperates with Hyun-heup to find the culprit. Meanwhile, Jung-woo, an English teacher at Bangju High School, witnesses his girlfriend's

  4. S1 E4

    Miseong Motel

    Jul 18, 202555 min

    Ji-wook, who was continuing the investigation to find the culprit of the Seon-ah incident, hears about the S-line from Hyun-heup, but doesn't believe it. Meanwhile, Bang Ju-goo, an employee who lives in a goshiwon and dreams of becoming an

  5. S1 E5

    The Glasses

    Jul 25, 202555 min

    Ji -wook, who finally discovered glasses in the bloody bathtub of aesthetic, admits that the words of Hyun -suk were true. Use the power of glasses to start an investigation into sexual violence in the runway. And I think that the person co

  6. S1 E6

    Chaos on the Horizon

    Jul 25, 202551 min

    Ji -wook finds out the truth about Sun -ah's S -line through glasses. Meanwhile, Hyun -suk, ahead of his 18 -year -old birthday, makes a big decision and meets the Jun -sun, which leads to an unknown confusion.

Starring

Frequently asked questions

Where can I watch S Line?
S Line is not currently listed on a streaming service in the US. Use the country picker on the page to check other markets.
How many seasons of S Line are there?
S Line has 1 season and 6 episodes. Status: Ended.
Will there be a new season of S Line?
S Line has ended; no new episodes are scheduled. The final episode aired on July 25, 2025.
Who stars in S Line?
S Line stars Lee Soo-hyuk, ARIN, Lee Da-hee, Lee Eun-saem, Kim Dong-young.

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