Write the first chapter for a wholesome novel starring a group of six adorable puppies who run a local cafe, named ‘Cafe Cinnamon’, and love to wear huge diapers, and have done so for so long it’s become perfectly usual to them. The novel takes place inside Cafe Cinnamon during a weekend (i.e. no customers that day). The puppies are named Cinnamoroll, Cappuccino, Mocha, Chiffon, Espresso, and Milk.
Cinnamoroll is the most well-known of the pups, being the poster puppy for his cafe; an endlessly welcoming, loving and pure-hearted white puppy with big ears and a curled tail, he can fly and glide by flapping his ears, though his heavily-loaded diapers often keep him grounded. A bit shy at first, but will quickly warm up to anyone with his child-like curiosity and caring instinct shining through, always serving his customers with a warm smile and a wagging tail.
Cappuccino is an incredibly gluttonous and laid-back beige puppy, recognizable from his white mullet and particularly rotund tummy. Due to his constant snacking and near-bottomless stomach, his loads are enormous and frequent, and he often poops himself in his sleep during his routinely naps. He prefers to put another diaper layer over his full one instead of changing out of it due to his laziness, and only ever decides to change when it's obvious the pamp he's wearing can't be filled any further. Only ridiculously large, XXL-sized diapers can accommodate for his gargantuan loads, and usually needs his friends' helping paws to assist changing him both into and out of such ludicrously vast diapers.
Mocha is the girly-girl and 'big sister' of the group, contrasting Chiffon's sportiness. A silky brown puppy with pink flowers at the base of her ears, she's a stylish, fashion-loving chatterbox and only sees diapers and wearing them as such, a fashion statement, often pairing them with her elegant dresses and outright refuses to poop in any of hers... though just like the other pups, she inevitably does, after which she will immediately go out of her way to change into a clean one. She crafts and wears her own custom-made diapers with exquisite prints and pleasant fragrances built-in.
Chiffon is the tomboy of the bunch, contrasting Mocha's girliness. A light orange puppy with thick, fluffy ears and tail, she's immensely spunky, sporty and energetic, often spending an entire morning and afternoon running around or playing sports outdoors, and wears diapers as a means of relieving herself in the middle of her athletics instead of wasting time and energy finding the nearest bathroom, oftentimes becoming so engaged with a strenuous activity she's doing she doesn't notice her diaper is totally loaded until after she's done. She wears heavy-duty, multi-layered compact diapers, able to be worn for hours, and filled to capacity, without sagging in the slightest!
Espresso is a cream-colored puppy with curled ears, the most intelligent of the pups, being well-bred and mild-mannered. A clever mind and a modest gentleman at heart, he is a natural expert at a variety of things, including painting and music, and is extensively knowledgeable on everything to do with diapers, from their varying sizes and respective capacities, as well as the best brands of diapers for any occasion and where to find them, as well as being an excellent and charismatic diaper changer and barista. Infrequently poops in his diapers, and will gladly keep a full one on for a while, even an entire afternoon, before changing himself, to ensure he doesn't go through too many too quickly.
Milk is the baby of the group. A teeny-tiny white pup, he's quite spoiled by the other pups and is never seen without his favorite pacifier in his mouth. Due to being an infant, he wets his diapers near constantly and can only babble the phrase "Ba-boo". Mocha is usually the one to change him out of his soaked diapers.
Include an exchange where all of the puppies, excluding Mocha, decide to have a big diaper-filling contest after they all eat an enormous dinner; whoever has the fullest, poopiest diaper wins and gets to smush and nuzzle the losers' packed diapers, as well as sound effects and onomatopoeia for the noisy messes the puppies make whenever they poop in their diapers out of habit (e.g. *FLBORRRRMPHT!*, *BLARRRRRMP!*, *BLORRRTCH!*, etc.), and dialogue from the puppies eagerly anticipating the giant poopies they're about to unload into their diapers.