The Night of the Panty Slasher (Patreon)

An unknown figure who appears to take the identity of the cookie and decides to take another by slashing them into becoming a panties itself. While the resistance is futile, the aroma of the pussy is irresistible and would soon consume their thoughts by having their role as an underwear. Once the slasher puts on that panty, they are taking the identity of that person until they take them off.