Chapter one draft, this is really really unpolished 'cause I just wrote what I had in mind but I hope you have fun reading it all the same

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	The chapter starts off with Rein barging into Kyoya's room to show his new invention, the 'Body suit zipper', which Kyoya initially disinterested until Rein just dragged him out of the room, Rein then explains the function of the zipper, the zipper would turn any living things that it put on into a living suit that you could wear and borrow their body, as for example Rein asked Kyoya to go grab any random dog, which Kyoya just hopelessly follow suits. After a while, Kyoya brought a German Sheppard that he probably found by the street.

	Rein then says to the dog, "We will borrow your body for a bit, I will give you a treat later okay!", he then put the zipper on the dog, which as expected really turned the dog into a body suit, this really surprised Kyoya, Rein then asked Kyoya to put it on, which then Kyoya reluctantly wore it, to his surprise, he actually feels like a feral dog, with keener sense of smell and such, and he somehow able to talk to which Rein explains he have make sure that the suit would allow the user to talk no matter what form they took (One of his failsafe procedure), now that Kyoya turned into the dog, Rein asked Kyoya if he's interest to know how it feels to be a dog for a day, which Kyoya says that he is somewhat curious, Rein then took out a leash and put it on Kyoya, "Then let's go for a walk!", as they walk throw the park, Kyoya feels really weird walking on four and nobody is staring at him, I mean he is a dog now lol, after a while, Kyoya suddenly felt some urges, he needs to pee, Kyoya says to Rein he wanted to use a toilet which Rein reply, "Why need a toilet when you could just pee in the public, you're a dog now!", says Rein as he laughs, seeing that Rein do have a point, he lifted one of his leg and actually peed, it felt weird, but nobody is batting an eyes to him, after he done, Rein the took out a water bottle and sprays it at the spot Kyoya peed, Kyoya just sighed, "you sure having fun walking me out as a dog huh", "Hehehe I do", Rein replied, then Rein suddenly seems as if he remembered something, he told Kyoya he would go ahead and go home and he told Kyoya to come home when he wanted to return back to normal, Kyoya told that he can't just leave him as a dog unattended, what if the stray patrol took him, which Rein says he would be fine since he got the collar before rushing off, Kyoya then just walk around the city and explore it as a dog. He is on his owns so his is best to avoid people and just everyone in general. But he's curious to see what he can do now as a dog.

	He then went home after he's satisfied, it's a bit hard to open the door as a dog but he managed somehow, as soon as he enter something bashed him making fall onto his back, what stood now on him is a golden retriever, that dog then suddenly speaks, "Kyoya! I have been waiting for you!!", "Wait... are you Rein!?". Though there's something strange about Rein, he seems to be panting a lot and rather... hot. Rein explains that the dog that he took is probably in heat. And, he felt like doing it with Kyoya, that also make Kyoya realizes why his red rocket was poking out of his sheath all day. They both began to getting overwhelmed by each other smell, Rein inserted his dog dick into Kyoya's dog butt, as he humps it, soon enough both of them let out a shot as Rein knotted Kyoya, Rein instinctively roll over like dogs usually do after sex, they pants and wait for the knot to come out, afterwards both of them return to normal and gives the dogs treat.

	Kyoya wonders if the cum actually stays inside the dog, which Rein simply reply, once they return back, the body that they borrowed would reset to when they become a body suit, so it won't leave any trace of what they have done to the body, releasing the dogs, they both went home, though Kyoya called out to Rein, says that he don't mind if Rein wanted to play with him more which Rein just gives a smug at him.