In the morning where it was really calm and the sun rising up, Rico gets ready for the day where he had invites one of his best friends to come visit him. He opens up the door, seeing Rurichiyo Kasumioji standing in front of him, giving her a big hug as she hugs him back tightly.

Rurichiyo: I'm so excited to see you again, Rico! It's been so long since we've hangout.

Rico: I'm happy to see you too, Rurichiyo. We're going to have our time inside of my mansion. I got something special to show you.

Rurichiyo: really? Is it another stick of gum~?

Rico: oh, it's more better. Come inside and find out~. *Wink*

He leads her inside of his mansion, escorting her to a room where there's experiments of different kinds of candy being created and ready to be tested, Rurichiyo see Rico grabbing a random soda from the vending machine, offering it to her as she opens it up, looking at the soda, and then drinks it. She felt refreshed, feeling the bubbles bursting with flavor, continuing to drink the can until it was all empty.

Rurichiyo: *sigh* that was really refreshing soda. It also really taste delicious too.

Rico: it's a new soda that'll be refreshing for people to drink, but once you drink the whole thing, the bubbles will make you really bloated.

Rurichiyo: huh? What that supposed t- urrrp! Excuse me. *Blushes*

Rico: it means you'll start expanding, Rurichiyo. Swell up for me, my big princess~.

He pokes her belly playfully, feeling it expanding while hearing her burping. Rurichiyo blushes, continuing to burp out bubbles as her butt and thighs expanding, stretching out her kimono and her breasts gets hugs. She giggles, feeling her arms and legs widen from the inflation, continuing to burp more as she gets a lot more bigger with air. Rurichiyo's body stopped expanding, becoming a size of a blimp, feeling Rico's hands rubbing her body and looking up at her with a mischievous smile.

Rurichiyo: *muffled* wow. That soda was amazing, Rico! It really inflated me so big~!

Rico: I knew you'll love it. It's also very safe for people since some have tried it out. I think you look adorable as a blimp, Rurichiyo~.

Rurichiyo: aww, thank you. Wanna hope on my back for a balloon ride~?

Rico: heck yeah I would love a balloon ride~!

He climbs on her back, bouncing on her slightly as she floats through the hallways, gently bouncing against the walls, giggling while feeling his small hands groping her large butt. Rurichiyo giggles turned to moans, enjoying the sensation, feeling Rico pulling up her kimono to expose her large butt cheeks. Rico would rub her Inflated breasts together, making them squeak, rubbing her nipples that are perk up through her kimono due to how turned on she was from the inflation and his hands touching her a lot.

Rico: hehe, I can tell you're loving this so much, Rurichiyo~.

Rurichiyo: *muffled moans* I really am since I'm so sensitive. Plus, I'm very turned on from you treating me like this~.

Rico: good. I love seeing you like this. It's really fun to have a big blimp like you to play with~.

Rurichiyo: *muffled* I'm glad you love me like this. Now play with my Inflated body more. I'm all yours, baby~.

Rico chuckles, continue to bounce on her Inflated body, making her giggle and burp out some bubbles, and cuddling on her more as he felt her lips deeply kissing him, and her inflated arms wrapping around him to give him a big hug. Rurichiyo moans softly, continuing to kiss the young boy as she really loves being his big balloon princess for his amusement to be play with for today.