Storyline
Keisuke Takatou awakens inside a mysterious white room with no memory of how he arrived there. He soon discovers that he is not alone, as six girls from his school are trapped in the same place. Before they can understand what is happening, a mysterious voice announces that they must participate in a dangerous game.
Keisuke is given the role of the “Unlocker,” while one of the girls is designated as the “Keyhole.” The group must complete a series of increasingly difficult challenges in order to progress through the locked rooms. Failure to follow the rules can result in severe consequences, creating an atmosphere of constant fear and uncertainty.
As Keisuke continues through the game, he begins to uncover clues about the mysterious rooms, the people controlling the game, and the reasons behind their captivity. What initially appears to be a simple struggle to escape gradually develops into a much deeper mystery involving the characters and their hidden connections.
The player's choices determine how the story develops, leading to different character routes, events, and endings. Exploring the different paths gradually reveals more information about the true nature of the game and the secrets surrounding the white rooms.