Watch the **finale—Episode 6** of *S Line* with English subtitles in Full HD!br br In this chilling conclusion, Han Ji‑wook (Lee Soo‑hyuk) and Hyun‑heup (Arin) race to stop the woman behind the S‑lines—mystical red threads that reveal people’s past sexual connections. As secrets unravel, Hyun‑heup sacrifices herself atop the school rooftop, triggering an explosion that makes S‑lines visible worldwide. Lives are scarred, power realigns, and nothing will ever be the same.