write me an explicit story of a young girl obsessed with pet girl role play, specifically puppy girl. She asks her boyfriend to buy her specific clothes and crafts some very explicit suit consisting harness, paws for arms and legs, a plug tail, a special strap that forces her to stay on all four, a leash, a cute dog muzzle that hides her mouth, a hairband with puppy ears. Other than that she was nude. They start from playing at home and have sex like that too, then carefully they started to try to have a walk at street and play outside. Girl becomes more and more obsessed with it and perverted, and as her boyfriend tried to stop her, she finds another person. There she jumps into her fetish, improving her look and gear, eventually she receives a full body paint that looks like dog fur. She enjoys activities in public places, on the street in her humiliating gear with others looking on her exposed titties and wet vagina. Eventually she becomes insatiable in matter of sex (sucking dick in park becomes something regular for her) and she swiftly learns to enjoy having sex with multiple people (masters of other puppy play pets) but eventually she starts to love sex with real dogs, preferring those as she finds their genitalia more exotic. In some months she discards her real life and all relations as she picks to be full time puppy girl, her bodypaint is replaced with permanent tattoo that looks like fur. Her ex boyfriend couldn't believe how she changed. She didn't want to talk to him at all, she didn't want to go out of her role. She even got a new nickname, slightly pervert but nice puppy name.