Already getting used to his life as a demon, as the wielder of the Red Dragon Emperor, Issei Hyoudou was having a "normal" life. That's when suddenly one night, the moon started to turn red and it affected all humans... including Issei's parents, leaving strangers and behaving hostilely as if they were beasts.

Wanting to save both his parents and the other humans, Issei and his harem will figure out what it was, how to make it stop, and find who did it. For the first time, Issei looked so furious and was willing to kill anyone who was messing with something they shouldn't. Including killing... beasts!

Highschool DxD crossover story with BloodBorne.