A school uniform.

You look into the mirrors and see a black, formal uniform appearing on your body. It looks like one of those uniforms worn at those private schools in the richer part of town. From afar it looks like you're actually wearing clothing, however up close you begin to see the subtle indentation of your muscles. Not to mention your hard cock pointing forward is unignorable whether or not it's painted to look like it's part of your pants.

"All done." Gabby announces as she gets up from behind you.

"Just about finished here as well." Chloe said before Ashe and Chloe confirmed that they have finished their sections as well.

"How about you Michele? Almost done?" Chloe asked Michele who was busy putting the final touches on your penis.

"Yeah just give me a second; I'm not exactly working on a nice flat canvas here..."

Michele swirled the brush around the base of your cock and slowly continued up the length of your shaft. The rest of the girls watched intently as the skin of your most delicate area is engulfed in a dark grey.

"Do you three really have to watch this?" You ask as Ashe, Chloe, and Gabby keep their eyes glued to Michele's handiwork.

"Shut up John, we're just making sure the main attraction gets the quality paintjob it deserves." Chloe said with a wave of her hand.
"Main attraction? What do you-" Suddenly the prickly ends of the paintbrush make contact with the sensitive glands at the tip of your penis. Michele isn't at all holding back and is going in rough; forcing you to the tips of your toes in discomfort.

"Wow!" Michele gasps as your cock once again narrowly misses the tip of her nose as it flies upward.

"Ha ha ha! Are you seriously that sensitive John?!" Ashe laughed aloud.

"Yes! It's a very sensitive part of my body!"

You settled back down onto your heels and Michele quickly returned to moving the brush slowly over the tip of your cock. The prickles of the brush dragging across it's rough surface in at an agonizingly slow pace. It was producing a feeling that you could only describe as a mixture of pain and pleasure, but above all else extremely emasculating.
In no way do you claim to be the toughest guy at school, but you feel like you could at least take a few hits without going down. This small little paintbrush being used by a girl half your size is currently making you tremble.
By the time Michele completed the first motion around you where biting your lip and curling your toes.

"Oh my god John, you look like you're about to cry."

Michele quickly glanced up to see you biting your lip and squeezing your eyes tight shut.

"Aww, what's the matter big boy? Is my wittle brush hurting your pee-pee?" Michele mocked before pressing down with her brush and quickly dragging it in a sharp motion.
"A-Ahhh!" You gasp and quickly jump back onto the tips of your toes.

"This is great!" Chloe chuckled. "Hey, Michele maybe whenever John pisses you off you should just pull his pants down and flick the tip of his dick."

Michele cracked a smile at that. "I sure wish I knew about this before. The amount of times I wanted this boy had an off switch only for him to have one hanging between his legs."

"Hey, what does that mean-" You start only to have Michele do a swift pull of the brush across your tip.

"Please, stop!" Was all you could quickly gasp.

"That's what I mean by that." She added with a smug smile.

You don't even know how to respond. How would you; she's got you by the cock right now. Either way it seems you don't have to as the door to the room swings open.