The BEST seasons of S Line
Every season of S Line ever, ranked from best to worst by thousands of votes from fans of the show. The best seasons of S Line!
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.
6.00
4 votes
#1 - Season 1
First Aired 7/11/2025
Han Ji Wook is a detective looking to know what is the truth behind the mysterious red line. Kyu Jin, a funny high School teacher. Hyun Hob, a high schooler who has been able observe the red line from birth. The show will present the story of a cryptic red line that appears over head of the people in the show, connecting them to people with whom who have had sexual relations with them.