Reasons

In the world of Hunters, a city develops itself with a population where majority are students. Some of them have strange powers, and those who don't know about Nen simply call them Espers.

These Espers are separated into Levels between 1 and 5. But only seven are know to be Level 5.

And one of them, the number one, are know. about his extreme power.

Now. Many reason will come to make them leave Academy City. But will some of them be hunters? O will they remain as the strongest Espers around?