Hiroki Shitara, a freelance writer for a weekly magazine, and Makoto Tsutsui, a TV news program director meet at the scene of a serial murder case in Tokyo and become attracted to each other as they cover the case together. However, as suspicions begin to surface about Hiroki, Makoto is conflicted about whether or not she should believe him.

10 days away from graduation, homeroom teacher Hiiragi, stands in front of his students and tells them they have now become his hostages. He says that no one can leave unless someone can tell him the reason behind a past student's suicide.

A college student's secret crush on a coworker at a small burger joint collides with chaos when a robbery erupts, unraveling hidden tensions and forcing a tight-knit group of eight to confront fractured loyalties and the blurred lines between love and betrayal.

A fierce struggle unfolds as a university team fights for a comeback in the Hakone Ekiden while TV producers battle behind the scenes to broadcast their story.

The drama tells the story of a group of seven university students who travel to a deserted island where a strange decagonal mansion stands. It was the scene of a grisly mass murder six months earlier, and events soon turn ominous.

Five young people from different backgrounds and facing unique struggles meet by chance and gradually find a place where they truly belong.