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Plot or Description
S Line is a 2025 Wavve original fantasy‑thriller directed by Ahn Joo‑young and adapted from the acclaimed webtoon by Kkomabi. Suddenly, glowing red threads—called “S‑Lines”—appear above people’s heads, connecting those who have had sexual relationships. The ability to see these lines is initially exclusive to a teen, Shin Hyun‑heup (Arin), but becomes available to others via mysterious glasses.
