The earth in 2212 is in a century that is about to end. When the disaster is caused by frequent solar activity and the imbalance of energy in the earth's core, only 2% of the elite and the lucky ones who get "FELIX" can board the ark and survive.
Hinata Aoi, who is gentle on the surface but has a strong personality, is the vice-captain of the Drum Band of Phyllis Private Girls' Middle School. After witnessing the captain who lost the Saas wind competition commit suicide by jumping off a building, he became insane and was admitted to the famous psychiatric hospital "Os". In Os, she met Kondo and other scientists who had been secretly imprisoned by the Tokyo government for thirty-seven years, and learned about "FELIX" that ordinary people cannot access. In the competitive competition "FAIL" organized by the anti-government underground organization, contestants must find and kill other players hidden around the world in order to obtain the ultimate life-saving "FELIX"...
As long as she keeps the "FELIX" in her hand, Hinata can protect everything she loves. And the first opponent she faced was actually a top student who never had "Fail" in the dictionary, and the captain's sister Shun Yuan died in front of her...