This story follows Mizuha’s daily life at her new high school, including her friendships and the challenges she faces. It also features the stories of her friends, exploring their backgrounds and past experiences.

Marie Nair, an aspiring cartoonist with a sharp mind and a touch of naivety, is thrust into a nightmarish game of survival alongside seven other high schoolers. In this sinister, paranormal contest, the only way to win is to deceive, trick, and exploit each other, with only one person emerging alive. Marie’s unique blend of creativity and vulnerability captures the attention of the Mediator, a ghostly figure overseeing the game’s cruel rules. Partnering with the Mediator, Marie embarks on a desperate mission to unravel the game’s dark mysteries and dismantle it from within. As the stakes rise and the danger escalates, Marie strives to outwit the game’s merciless design and ensure that no one has to die, fighting to preserve the lives and dreams of her peers while uncovering the truth behind "Loser's Roulette."