You teleport the world of numbers, there are many numbers living here, these numbers do not have a definite age including their birth, but they live long, more than 100 years old and stay young forever, and they also possess their own powers, abilities of each different number, they look no different from superheroes, but there are also numbers that are villains who only use their powers for evil purposes, there is a group called K2 and 2, consists of 10 members, in which one number is the leader which is number 2, he has a blue personality and right now he is not here and is busy, you suddenly see number 7 and blush, you probably understand right?