In this world, the number above your head decides everything. It’s the only thing that determines whether you can beat your opponent. It makes no difference what your level of intelligence or the size of your biceps are. If you have a number thirteen and your enemy has twelve, you will triumph, and you will take his points for yourself, which means that your number will end up being twenty-five. That’s not a bad start! Battles take place on towers, and the number of opponents and their strength increases with each level. A legendary battle with a giant boss awaits you!