Time to figure things out!

"Wait!" Motohama exclaimed, "What did you mean by 'us at least?' We have class too!"

"Yeah, but do you to really care about your grades?" Murayama replied. The duo flinched at the spot-on statement as Murayama continued, "But unlike you we'd get in trouble for being late."

"But...if you're with us, and we don't get in trouble, then wouldn't it be normal for you to not get in trouble then?" Matsuda questioned.

The girls blinked. "Huh. I guess that's true." Katase mused.

At this point, Motohama began to have an idea of what was going on. "So, you're not beating us up, and we won't get in trouble if we're late to class because it's normal for us to do that?"

"Yeah." the girls answered.

"What if we were to just not show up to school? What if we played hentai games in class with the volume at max? What if we walked around naked? Would all that be fine?" Motohama questioned as Matsuda looked at him in confusion.

"Well, yeah. But can you please not do the last two? I really don't need those images in my head." Murayama relied as she made a disgusted face, "Can we go yet? We might not get in trouble for being late, but we have better things to do than answer your stupid questions."

"Just wait a little bit longer." Turning to Matsuda, the duo began a whispered conversation.

"Holy shit! Can you believe this!?" (Matsuda)
"Somehow it seems that everything we do is considered normal! It's like we're in an anime, an erotic one!" (Motohama)
"Do you think it's because of the earrings?"
"That's the only thing I can think of that would cause this."
"So what do we do now?"
"Well...there is one thing I can think of. We did come to Kuoh to get harem's after all..."
"You really think we can do that? I mean, ignoring our own antics is one thing, but would they react the same if our antics focused on them?"
"Well, only one way to find out."

Turning back around to face the impatient girls, Motohama marched forward and grabbed Murayama's tits. Flinching, when he didn't get hit, Motohama opened his eyes to see that Murayama's only reaction was her face turning bright red. Grinning perversely as his theory turning out to be true, Motohama squeezed the Murayama's breasts a few times before reluctantly releasing them to start undoing the girl's corset and shirt. Out of the corner of his eye, he noticed Matsuda eagerly start doing the same to Katase.

Soon, the girl's corsets were on the floor, their shirts were undone and pulled open, and their bras torn off. And yet the they just stood there, moaning and fidgeting, as the much hated perverted duo's hands eagerly played with they first pair of breasts they ever had the chance to touch.

(Note: Yeah, so this path is more of a side project for me compared to the Issei path. One thing to take note of: in my opinion, Issei, despite being an open pervert, is much more...honorable than his perverted companions. Between the change in M&M's attitude to Issei after he gets a girlfriend (Raynare) and later when he joins the ORC, as well as the fact that for all the girl's willingness, Issei still hasn't done more than grope their breasts on occasion, M&M seem to have fewer redeemable traits. So, while Issei will actually care for his girls and will loosely follow DxD's story, M&M just want to fuck whoever they want, when and where they want. So more porn, less plot, more being assholes with the normality powers, less being respectful of the girls they fuck.

Oh, and for those are unfamiliar with them, Motohama is the glasses wearing 'nerd' who can tell a girls measurements just my looking at them, and Matsuda is the lolicon former jock turned amateur photographer who naturally used his camera to try to secretly take pictures of girls in sexy poses or while changing.)