While on patrol before heading back to UA, Izuku Midoriya, also known as Deku by his friends was chasing after a runaway villain who ends up catching him off guard and uses their quirk against him, as Deku starts to feel his body slowly beginning to change, it's a weird sensation he feels throughout his body which lasts for a while, by the end of it leaves him completely transformed into a girl and a chubby one at that, his or now... her hero suit now feeling really tight around her chubby body that it starts to tear around the chest and belly area of her suit, her big butt also stretching out the back, leaving Deku exposed and incredibly embarrassed. It seems that whoever's the villain has a bizarre quirk that changes the gender of anyone they touch while also making there target chubby Huh… w-what’s happening to me!!! Why am I a g-girl… a-and so big too!?