18+ Megami no Karnaval

In front of Mochizuki, a normal high schooler, appears a wounded girl named Mayuki. Mochizuki takes her to his home and finds out that he has gotten himself involved in a war that goes far beyond any human comprehension. One after another, Mochizuki and Mayuki confront girls that bear an unfortunate destiny to fight to the death. Mayuki and Mochizuki are left with no option left but to fight...

(Source: MU)