I felt my body starting to transform and feel different. I rub my ass in the briefs with thoughts of how big it will be. My cock instantly gets hard as I pull the briefs over. I slip each of my legs in the briefs and think of how thick and muscular the guy’s legs were in the photo. As I feel the cotton between my fingers, I continue to imagine how great my ass will look in these once I have transformed. I stand naked and look at the briefs in my hand. I walk behind the screen and slowly take off my clothes thinking of the guy in the photo. He instructs me to imagine myself as the guy in the photo and ONLY the guy in the photo and no one else. The wizard hands me the pair of briefs and tells me to go change into the briefs behind the screen near the back of the room. A pair of white briefs appear out of thin air. The wizard whips out his wand, chants a few words and points at the table. The guy must be like 5’10” or something from the photo. He is wearing a baseball cap with a little hair on his chest and shows his perfect backside and showing off a gorgeous ass in white briefs. It’s just some instagram influencer taking a selfie in the mirror. I show the wizard a picture of the ideal guy I want to become on my phone. I’m a white 30 year old guy sporting a dad bod but desire to be a tan, hairy, clean cut guy with a bubble butt and maybe even a bit shorter than I currently am at just over 6’.