S Line (South Korean Web Series)

S Line is a South Korean web series released in 2025. The series is an adaptation of the webcomic of the same name by Ggomabi, which was originally serialized on Naver between 2011 and 2012. The show is directed by Ahn Ju-Young, who also contributed to the writing.

Premise

The narrative is set in a world where red lines suddenly appear above individuals' heads. These lines, referred to as the "S Line," physically connect people who have engaged in sexual relations. The manifestation of these lines leads to the exposure of personal secrets and private relationships, creating significant social and psychological tension. The story follows a detective, a teacher, and a student as they navigate the implications of this phenomenon.

Main Characters

• Han Ji-Wook (played by Lee Soo-Hyuk): A detective characterized by his free-spirited nature and pursuit of the truth behind the S Line.
• Lee Kyu-Jin (played by Lee Da-Hee): A high school teacher.
• Shin Hyun-Heup (played by Arin): A high school student who has possessed the ability to see the red lines since birth.

Production

The series consists of six episodes and is distributed through the streaming platform Wavve. The production features a large ensemble cast, including actors such as Kim Dong-Young, Lee Eun-Saem, and Park Sung-Il, who portray various members of the community affected by the S Line.