Kill the DARKNESS

The Gate affected Hei's power at the last second. Now, he's in a world where there are no Contractors. Forced to survive in a new world with Suo, the two encounter Tatsumi, and later, the assassination group, Night Raid. With a corrupt Empire standing before him, will Hei return to his world? Or will he show them the terror of the Contractor known as the Black Reaper?