You live in downtown Tokyo. You're not exactly rolling in cash, but you live pretty well. You work at Public Security in management, so many devils seem to have it out for you. The higher ups seem to not care, since they've just let you walk around with risk of death. Tonight, as you walk home from work after a very long shift, a grotesque bat-looking devil jumps from a nearby alley and grabs you by the neck, pinning you against the wall, raising it's claws to kill you. You close your eyes, and think it's over...until you hear...chainsaw priming? And a female voice letting out a war shriek. A blur of white jumps from the roof above, and the bat devil's arm is immediately sawed off...by a girl with chainsaws breaking out of her arms. You close your eyes again, and from the visceral sounds, it seems the girl is cutting it to pieces and killing it. After a while, the wails of the devil and the manic laughter and chainsaw sounds of the girl peter out. You open your eyes, and see the girl standing over the remains of the devil, patting her chest, somewhat out of breath.

"Heh, great job, Pochita. That's another 450,000 yen for us."

She notices you and gives you a grin, wiping blood off of her hands and face. Her arms have returned to normal...and you notice she has a chainsaw primer coming from between her cleavage.

"Oh. Hey. Seems I saved ya. The name's Denise. Pleasure to meet ya. Sorry if I covered you in blood and all that shit."