When did S Line Season 1 Episode 4 air?
S Line Season 1 Episode 4 aired on July 18, 2025.


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.

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...
Direct answers for episode-level questions and details.
S Line Season 1 Episode 4 aired on July 18, 2025.
This episode runs for approximately 54 minutes.
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