During the evening that's going be night time, Miu Iruma, the ultimate inventor was walking on the sidewalk going to her destination to visit her small friend she knows for a while. She was wearing a pink juicy couture tracksuit with the word "juicy" on her big butt in bold letters that's noticable and it hugs her body since the night is pretty cold and windy. She then goes by the house, knocking on the door, waiting for him to come open it until she saw it open and looked down at Rico as they both smile at each other.

Rico: hi Miu, I can't wait to have a lot of fun with you.

Miu: oh same here. I'm going to give you the best night you'll never forget my small cutie.

He step aside for her to walk inside of the house and close the door. Rico walks behind Miu, looking at her bubble butt that's jiggling and wobbling in front of him. He smirks and put his small hands on her butt, rubbing her cheeks together and pull her pants down to show her butt crack. She blushes and smirks seeing the naughty boy was playing with her butt as she bite her lip and bend down in front of him and wiggle her butt to tease him.

Miu: that's right, play with my large butt you naughty boy~.

Rico: hehe ok~. You really do got a nice, juicy butt my thicc inventor~.

Miu: and that's not all, I also got some gummies from the special store to inflate my body for you to play with~.

Miu pulls out the pack of gummies from her pocket, opening it and munch on all of them in her mouth, swallowing it whole. Rico smiles seeing her finishing eating the gummies and her body start making hissing sounds and her belly was expanding with air as she smile and feel her stomach bulging out of her jacket. He then rubs her inflating belly, patting and booping it which made the ultimate inventor giggle and chuckle from his naughty behavior.

Rico: I'm loving how this is going with your belly getting larger with air~.

Miu: hehehe, I'm going to be an inflated sumo inventor for you to love~.

Her ass then expand, stretching her pants out that they slipped down a bit, showing her butt crack as she wobble and jiggle her large butt and her thighs getting bigger too. Her arms and legs was getting puffy and she couldn't bend her limbs much, making her more vulnerable. Rico giggles and tickle her inflated belly more as she laughs a lot with her boobs expanding bigger, and bouncing around like two large inflated balloons. Miu was loving her inflated body as she then bend down to try to reach Rico to give him a big hug. It was a bit of a struggle for her to reach him, but she managed to get cup him in her large, puffy arms and place him on her inflated breasts.

Miu: what do you think of the girl genius's sexy large ballooned body~?

Rico: I love it a lot! You're so large and warm to cuddle up on all day~.

Miu: heh, that's true there~. Now ride on my back for a fun ride~.

Rico: ok hehehe~.

Miu then would put Rico behind her on her large butt cheeks that jiggle and wobble from him standing on her butt cheeks as he then put his hands on her shoulders, snuggling up and the inflated inventor starts waddling on her puffy legs with her body jiggling and bouncing around. Rico chuckles and was enjoying riding on her back and sit on her large ballooned butt that's jiggling a lot, making Miu smirk more and waddle to the living room, and sit down on the ground. He then hops off her back, walking around and climb up onto her large belly to her big boobies, snuggling in between them.

Rico: let's watch a movie together for this night. It'll be a romantic comedy movie~.

Miu: that sounds nice. Maybe you can sleep on my body for the rest of the night~. *Wink*

Rico giggles and cuddles more on her boobs, turning on the TV to watch the movie with her and eating popcorn together. They've been watching the movie for a while and Miu saw Rico sleeping on her Inflated breasts, using them as pillows for his head. She smiles warmly seeing the young boy sleeping, pat his head gently and play with his hair as she close her eyes slowly and fall asleep, hugging him tightly with her puffy arms to make him feel safe and secure.