6 titles, most popular first
Seong Soo-ji transfers to Baekyeon High School and learns that students are sorted by a secret ranking system that lets those at the top torment those below. Landing in the lowest rank, she becomes a target of cruel bullying and resolves to fight back against the game itself.
Woo Seul-gi grew up in an orphanage after getting lost on a school trip as a child. Now she transfers to Chaehwa Girls' High School, one of the most elite in the country, where amid fierce competition over the college entrance exam she is drawn into the mystery of her father's suspicious death.
Shooting champion Ok Chan-mi refuses to believe that her twin brother took his own life. As the police prepare to close the case, she transfers to his high school to find out who is responsible, and she teams up with Ji Soo-heon, a troubled boy who seeks justice through risky means of his own.
Mysterious sphere-shaped creatures fill the sky above Earth, and the senior class at Sungjin High School is drafted to fight them. Promised extra credit toward their university entrance exams, the students learn to handle guns and stay alive under Lieutenant Lee Chun-ho, their platoon commander.
Class 2-3 of Yooil High School heads to a retreat center on a field trip, but their teacher and the students of a second class soon go missing. When night falls, every student in the building receives a message announcing that a real-life game of Mafia is starting, and staying alive means rooting out the Mafia hidden among them.
On Christmas Day, a student at an elite high school falls to his death, and the police and school are quick to call it suicide. When another student claims to have seen a murder, unease spreads; ignored by adults and chased by reporters, the students decide to hold their own trial at school.
