Rowan_Eternal

Demons, angels, factionless entities of chaos; he sees them all as plain as day, ignoring them to try living in peace, that all screeches to a halt when the end of the world came knocking opening thousands of gates from hell across every country globally.

In an attempt to escape his hellish fate, Kai is forced to tread a grey area where there are few allies and all sides view him as a tool or an enemy, relying on the presence of one girl who chose him above all else to keep himself from falling into despair and insanity. 

Humanity is doomed unless he and others like himself rise up against the endless hordes of demons and find a way to close the gates of Hél, but is it worth the sacrifice? 

Will he willingly save the very people who turned their backs on him, or will he choose the ever-widening path of darkness and become what they all fear he will?

Advent of Cataclysm.

"Kai is capable of fending off dozens of hél-spawns on his own, while I am sure some of you could at least take down a few, he has far more experience coupled with strength on par with the likes of Shinsuke Onishi, you do not need to like him to learn from him, but I will not tollerate any distractions in my class, understood, Tilli?" She looked at the girl who had spoken.

"Good," Yui turned again to Kai. "The scanners got a lot of data from the demons before they went offline yesterday," She began, tapping at her wristband while a training bot fell from a small door in the ceiling, landing and standing before him.

"The same way you explained it to Rai and Sashi, I want you to teach them how to kill these things, I know its just one type, but since we are in the middle of updating our training systems this much for now is fine."

Eliminate.