Twenty-year-old Matsuri Takabayashi learns that she only has ten years to live due to an incurable disease. She decides to not dwell on her life and not to fall in love – until she meets a man named Kazuto Manabe at a school reunion.
Kiyosumi's affection for his schoolmate Hari grows after he saves her from bullying, but a dark secret she's unwilling to share threatens their bond.
A group of high school students are forced into a game where they are hypnotized to commit suicide on an unknown command. Where no one is safe from a sudden death, how can they avoid their fates?
