It's the year 248 aa. No one's safe. Monsters occupy most of the world and the few humans are very lucky to survive. Yet, there are now Monster Hunters. People specially trained in killing and exterminating monsters.
Miko is a young, shy girl whose family was eaten by a monster when she was younger. Her best friend Kimiko is willing to take any challenge and aiming to be the best Monster Hunter ever alive. The two of them go to a very unique school, A special school designed to train today's youth into experienced Monster Hunters. But there's a catch, only the top 10 students become Monster Hunters and the rest have to stay in the school for as long as it takes them to. Both girls try hard to stay at the top of their grade. Will they become Monster Hunters? Or will they even save humankind?