When a software developer creates a dating app that a serial killer uses to find his next targets, she’s drawn into a dark world of romance and murder.

In 1999, a teen girl keeps close tabs on a boy in school on behalf of her deeply smitten best friend – then she gets swept up in a love story of her own.

In 1987, when tear gas exploded like firecrackers, a bloody man jumped into a female college dormitory and a female student treats him thinking he's an activist student fighting for the generation. Based on the handwritten notes of a man who escaped from a political prison camp in North Korea.

A mysterious, clever girl named Nanno transfers to different schools, exposing the lies and misdeeds of the students and faculty at every turn.

An unfathomable incident introduces a genius engineer to dangerous secrets of the world — and to a woman from the future who's come looking for him.