In the box, beneath a layer of yellow tissue paper you find a pair of white and gold sneakers, adorned with a picture of a horse shoe on the sides of each. Confused you lift one up to examine it. They're much bigger than your foot size and the look incredibly gaudy. Examining the box you don't see any return address, so you can't send them back. You think for a moment. shoes are expensive, if you can find a way to make it work it'll be cheaper in the long run, you realize looking at your worn out tennis shoes, lying across the room.
You decide to try the on. You stick your bare feet into each shoe and lace up the laces. Sure enough they're huge on you. You try walking but they're so big you trip over them. You gotta take them off.
You reach down to remove them and gasp, the shoes are glowing a bright golden color. You start feeling strange, you feel something happening to your feet, almost like they're growing! You reach down to pull the shoe off but it won't budge. Suddenly a thin layer of brown fur starts climbing your legs, changing them as it travels up. Your legs become more thin and more muscular. The fur keeps growing reaching your groin and soon after a massive furry cock slides out the leg of your shorts, pressed against your leg. A black furry tail also poking out the top. The changes keep happening as it travels, turning your average sized chubby body into a trim, tall ,well muscled machine. Soon it reaches your head and you feel it start changing growing out into a snout, completely changing shape. You stumble your way to your bathroom mirror distraught at what's happening to you and staring back is a 7ft anthro stallion. You look down at your shoes, they're no longer glowing. You sit down on the toilet and try to pull them off, hoping your not stuck as a horseman.