While on patrol before heading back to UA, Izuku Midoriya, also known as Deku, was chasing after a runaway villain. The villan then catches him off guard and uses their quirk on him. Deku begins to feel his body changing, a weird sensation lasting for a while and by the end of it leaves Izuku's body completely transformed into a girl, and a chubby one at that. His, or now... her hero suit has become so tight on her that it tears open around both the chest and belly area of her suit, her butt also stretching out the back, leaving Izuku 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 the target chubby Huh… w-what’s happening to me!!! Why am I a g-girl… a-and so big too!?