Just a random idea that popped into my mind while reading some dxd fics.
What if Issei had a reality marble?
I think he has the qualifications to own one as his beliefs in boobs is so powerful that he summoned a booby fairy working for a booby god from another dimension to give him booby power...
Yeah he's qualified.
Also at certain points whenever he sees a naked woman he'll save the data in his mind, kinda like tracing. At a certain episode during art class issei is able to unconsciously make a perfect clay model of Rias.
——trailer—-
Issei stood there cornered with nothing else, he lets a sight before he said.
"I have boner in my pants"
"As hard as steel, Lust drives it mad"
"I have read more than a thousand (Porn) books"
"Unknown to sex, nor to woman"
"Many times I have with stood great pains to fap thousands times"
"And yet, these hands will never hold anything, but my dick"
"So I pray now, Unlimited H Works!"
As he finished his chanting a sudden bright light flashes causing everyone to be blinded for a second.
The next time they open their eyes they suddenly discovered themselves in a strange new world.
—- trailer end—-
This is more of a joke then anything else so anybody that wants to use this to make an actual work they're free to do so.