The S-class guide wants to be professional

Thirteen years ago, portals had begun appearing around the world. In these portals non-humans creature began appearing, these creatures could not be harmed by military nor nuclear weapons.

No one could handle its monstrous power.

But then humans with supernatural abilities began to appear.

These beings were called espers.

Espers had unique characteristics, with power ranging from physical to supernatural abilities such as telekinesis and teleportation. These espers were classed from E to S class.

But there was a major flaw.

The more espers used their abilities, the more dark energy they stored up that caused them to go on an rampage. This had made them a danger to society but as that happened a second group of supernaturals appeared.

Guides.

The beings that could purify the dark energy of espers. Like espers they were classed by ranks, but unlike them the higher the class the more efficient their guiding became.

And Kim Woojin had awakened as a guide.

An S-class guide, at that.

HIs life will be turned upside down, but how will he handle it?