Hyun-heup, a girl who was born with the ability to see the S-line that indicates sexual relations. Because of this ab...

Hyun-heup goes to Bangju High School after receiving a mysterious text message. There, he reunites with Seon-ah, a mi...

Seon-ah falls from the rooftop and falls into a coma. Ji-wook cries out in self-reproach and anger, and cooperates wi...

Ji-wook, who was continuing the investigation to find the culprit of the Seon-ah incident, hears about the S-line fro...

Ji -wook, who finally discovered glasses in the bloody bathtub of aesthetic, admits that the words of Hyun -suk were ...

Ji -wook finds out the truth about Sun -ah's S -line through glasses. Meanwhile, Hyun -suk, ahead of his 18 -year -ol...