In this world, people are born with different kinds of abilities that they awaken when they are 15 years old age.

The abilities don't really have a particular rank, as they depend on the user. Like, A Teleportation ability could be an S-Rank Ability if it could teleport you too many kilometers away.

But if the distance it teleports is only one meter, then it would be practically useless and considered to be a D-Rank ability.

However, abilities are sometimes graded as potential ranked abilities. Some abilities, like changing the color of hair, will remain useless no matter how much you try to make them work. But some abilities have the potential to reach terrifying power levels.

Then, the ability users are ranked according to their ability and how much control they have over it.

The rankings go from F-Rank to SSS-RANK. There is also a Zero Rank that will be discussed later in the story.

I'll add things as we progress in the story