Drama Mystery Sci-Fi & Fantasy
7.5/10 2025 · 1 Season· 6 Episodes · Completed ·KR

Creator: Ahn Joo-Young, Kkomabi

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.

Cast

Lee Soo-hyuk
Lee Soo-hyuk
Han Ji-wook
ARIN
ARIN
Shin Hyeon-heup
Lee Da-hee
Lee Da-hee
Lee Gyu-jin
Lee Eun-saem
Lee Eun-saem
Kang Seon-ah
Kim Dong-young
Kim Dong-young
Oh Dong-sik
Lee Gwang-hee
Lee Gwang-hee
Joon-seon
Lee Han-joo
Lee Han-joo
Yoon Ji-na
Woo Ji-hyun
Woo Ji-hyun
Jung-woo
Nam Kyu-hee
Nam Kyu-hee
Kim Hye-yeong
Oh Woo-ri
Oh Woo-ri
Lee Kyung-jin
Oh Seung-jun
Oh Seung-jun
Lee Ji-won
Kim So-young
Kim So-young
Choi I-seo
Park Seong-il
Park Seong-il
Bang Seong-jin
Lee Ga-sub
Lee Ga-sub
Oh Jung-min
Park Ye-ni
Park Ye-ni
Hee-won
Jeong Jae-kwang
Jeong Jae-kwang
Bartender
Jang Sun
Jang Sun
Hyeon-heup's Mother
Oh Ah-yeon
Oh Ah-yeon
Kwak Chae-rin (Ep...
Shin Dong-mi
Shin Dong-mi
Police Station Woman
Cho Han-cheul
Cho Han-cheul
Kim Byeong-Cheol ...

Episodes

S Line (2025) S01E01 – Girl With Sunglasses S01E01 50m
11 Jul 25
S Line (2025) S01E01 – Girl With Sunglasses
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 suspicious murders occur around Hyun-heup, and Hyun-heup uses his ability to see the S-line to track down the case...
S Line (2025) S01E02 – Animal Kingdom S01E02 50m
11 Jul 25
S Line (2025) S01E02 – Animal Kingdom
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 bullying from bullies reaches its peak, Seon-ah discovers a mysterious pair of glasses in her locker...
S Line (2025) S01E03 – Apartment S01E03 56m
18 Jul 25
S Line (2025) S01E03 – Apartment
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 affair before their wedding and breaks off the engagement. And soon after, he finds a pair of glasses on his desk...
S Line (2025) S01E04 – Meishin Hotel S01E04 54m
18 Jul 25
S Line (2025) S01E04 – Meishin Hotel
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 actor, finds S-line glasses at Mi-seong's house and feels liberated, but soon after, he sees a woman connected to the music teacher he had a crush on and feels strong jealousy...
S Line (2025) S01E05 – The Glasses S01E05 54m
25 Jul 25
S Line (2025) S01E05 – The Glasses
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 connected to the only one S line of Sun -ah is the culprit of the Sun -a case.
S Line (2025) S01E06 – S Line S01E06 50m
25 Jul 25
S Line (2025) S01E06 – S Line
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.

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