In 3035 AD, a virus called "P" (Paradise parasitism) began to spread around the world, causing countless people to lose their lives. It is also this virus that allows girls who should have spent happy time in school to reunite on the battlefield. They are heavily armed and running between cities, trying to find out the truth about the virus outbreak. Little did they know that while they were running, the world had already begun to undergo epoch-making changes.
Intention: This world stops here.