It has been a week since Unikitty won that sumo contest and got her friends that gold pass for the sushi restaurant. It was all thanks to Dr. Fox and her machine that helped Unikitty get the pounds and girth necessary to overcome her larger and more skilled opponent. Since then, she decided to keep her weight for the time being, wanting to enjoy being a sumo princess a lot more. One person who found that weight appealing was Dr. Fox herself. Today was the day when she was supposed to use another device to help her friend get rid of the weight, however she wanted to have a bit more fun before that happened.

"You want to have a sumo match with me?" Unikitty asked upon hearing Doc's request.

"Not a competitive one, just a fun little match. Nothing too serious." the scientist nervously said.

"Well, it does sound like fun. But why though?"

Dr. Fox nervously shuffled her feet, "Well… how do I put this…? I kinda like you like this."

"Yeah, I do look even cuter and huggable than before. I'm guessing you just want to snuggle me the whole match?"

"Yep. And I also encourage you to play with your fat as much as possible. I'll turn you back after the match."

"Then let's do it!" Unikitty said while stomping her foot.

Dr. Fox's lab robots put together a buildable sumo dohyo in the lab for the match. One of the robots got into the ring dressed as a referee, "Ladies and gentlemen! Welcome to Snuggle Sumo! To the east, Dr. Fox of the lab!" it announced as it pointed towards Dr. Fox. She was dressed in a plain white shirt and a green mawashi. She gave a cute stomp while smiling. "To the west, the reigning champion, Unikitty of the throne!" the robot announced while pointing to Unikitty. She wore her pink mawashi that Dr. Fox gave her when she participated in the contest. She gave a heavy stomp that made her smaller opponent shake a bit.

Both girls walked to the center of the ring, "Ready to rumble, Doc?" Unikitty asked.

"You bet." Dr. Fox responded. She absolutely loved the view of Unikitty's towering wall of fluffy fat. They both bent down into starting positions before the robot ref waved the flag. Unikitty stayed where she was, arms outstretched as Dr. Fox ran up and snuggled Unikitty's belly while pushing her. Unikitty giggled at this, the pushing barely moved her but the snuggles she was getting were enjoyable.

The scientist couldn't have been happier. Her tail wagged as she let herself get buried in the fluffy pink fur. She gave a small yelp of surprise as Unikitty leaned forward, burying her even further into the fat. She got out of there quickly, leading to a friendly chase around the ring. "Raah, I'm gonna get you!" Unikitty cheered as she chased her friend around the ring.

Dr. Fox let herself get cornered, feigning intimidation, "Please don't hurt me, Sumo Princess!" she said in fake fear. Unikitty simply performed a soft nekodamashi, lightly patting both of her friend's cheeks. The scientist feigned dizziness as she wobbled in place. Unikitty simply picked up her friend and gave her a squeezing hug, causing the fox to blush and wag her tail.

Unikitty then started to giggle as the tail moved against her belly. Dr. Fox realized this and deliberately started to swish her tail against the large pink mass. Unikitty burst out laughing at the tickle attack and Dr. Fox was able to get free, "Cheap shot, Doc." Unikitty playfully teased.

"Don't like it? Come and catch me." Dr. Fox said before beginning to run circles around the princess. She was an orange blur that Unikitty could barely keep up with. She was left dizzy in the middle of the ring as Dr. Fox continued to run around her.

Unikitty snapped out of her dizziness and smirked as she got an idea., referring to what Dr. Fox said about playing with her fat. "Hey, Doc. I think this counts as playing?" Unikitty asked as she began to beat her large fluffy belly like a drum. It even started to make the same noises as a drum. Dr. Fox suddenly began to slow down before stopping in front of the princess' belly, the drumming starting to draw her in. Eventually the beat was starting to entrance the scientist, causing her to sway in place as she looked to be staring into space.

The princess giggled at her friend's hypnotized state, watching as her eyes seemed to glaze over and a bit of drool poured out of her mouth, "Wow, she must really like my tummy drum." she thought as she continued to pound her belly. She moved closer to the dazed fox while keeping up the beat until she was close to the fox's head. She then thrust her belly back and bumped her friend while slamming her belly with both paws. Dr. Fox managed to get herself steady before she tripped out of the ring.

"That was some pretty nice drumming, Unikitty. Care to finish me off?" Dr. Fox taunted.

"Would you like a shove or belly slam?" the princess asked.

"Surprise me." Unikitty obliged to this request and prepared to give Dr. Fox a massive slam from her belly to the padding outside the ring. She ran towards her friend, her mouth open wide in a cute yell. This was the opening the scientist needed though, as she pulled out a small ray gun and shot it into Unikitty's mouth. This was not one of her deadly beams though, for what shot into the princesses' mouth was the same batter-like substance that gave her the girth in the first place.

Unikitty was surprised by the attack, a surprised feeling that slowly turned to pleasure as she once again tasted that delicious substance. She stopped her charge to take in the sudden meal, rubbing her belly as she did so. Dr. Fox turned the ray off and let Unikitty finish gulping it down. The princess gave a satisfied belch as she gave her bigger belly a pat, "Well, thanks for the meal, Doc. But now I have to-" she was interrupted by another stream of batter entering her mouth.

Dr. Fox watched as her friend's belly continued to grow. Unikitty was too busy being in a trance of her own, that of the sweet taste that was filling her mouth at the moment. The stream stopped and she rubbed her belly once more, "OK… now I-" Another stream entered the princess' mouth as she found herself become less focused on her surroundings. With every stream that stopped, another would make its way down Unikitty's throat when she opened her mouth to speak. The trance she was in only grew from there, with Unikitty growing less aware of what she was supposed to be doing.

In the meantime, Dr. Fox was enjoying every second of it. It was really fun to aim for her friend's mouth and watch as her pudgy fluff became bigger and bigger. After another stream was stopped, the scientist reviewed her work. Unikitty was a lot larger than before, swaying in place with a lidded gaze while rubbing her belly and licking the leftover batter from her lips. It was obvious that she was too out of it to continue the match, and that was fine. Dr. Fox simply tapped her friend's belly with a "Boop," resulting in Unikitty tipping over onto her back with a loud thud that shook the ring.

Dr. Fox hopped onto her friend's belly with a triumphant pose, "Behold, your Snuggle Sumo champion!" she said before looking down at her friend. Eating all that substance made Unikitty fall asleep, gently snoring and possibly dreaming about eating more of the delicious batter. Dr. Fox decided to let her friend rest while she readied up the fat reduction machine, "Perhaps we could do this another time." she thought as she got to work.