After hopes peak academy was over where Kyoko Kirigiri was getting back home to the mansion to see Rico where their fun was going to begin. She gets inside, finding him setting up the living room with decorations as she giggles and carries him in her arms, giving him a kiss on the cheek.

Rico: welcome home, Kyoko. How did it go in hopes peak academy~?

Kyoko: it went well, Rico. I graduated as well, so I've thought about if we can have a good time together~.

Rico: that's good to hear. Congratulations on graduating! Chiaki also graduated from hopes peak as well and I've played with her a few hours ago. Now it's your turn, Kyoko~. *Wink*

Kyoko: *chuckles* I'm up for anything, baby~.

She puts him down on the floor, smiling at him as she bends down to his level to give him a big kiss on his lips. Rico giggles, kissing her back as he would put his hands on her cheeks, gently blowing air in her mouth, puffing her cheeks up along with her body slowly expanding. Kyoko giggles, looking at his eyes with a hint of mischief, enjoying the sensation.

Kyoko: *muffled* so that's how we're celebrating my graduation? You're such a naughty boy, Rico~.

Rico: yep! I need a balloon for this moment and you're my best balloon ever, my puffy detective Mommy~.

Kyoko: *muffled* keep going then. I can handle as much air you blow in me. Make me your big balloon, baby~. *Wink*

Rico: you got it, Mommy~!

He continues to blow air in her, seeing her growing more bigger with her belly expanding, popping off the buttons from her shirt along with her butt and thighs expanding, showing her panties and her crack, slowly floating from the floor. Kyoko moans softly, loving her little boy puffing her up to be his big balloon, feeling her arms and legs sinking in her body and her breasts inflating, squishing him between. Rico let her lips go, chuckling to see her bouncing a bit as he hops on her back to ride her around the mansion.

Rico: now this will be a fun day to celebrate with you like this. I'll give you the best celebration ever~.

Kyoko: *muffled* aww, thank you, baby. I'm happy you do this for me~.

Rico: you're welcome. Now, let's have a lot of fun together. You deserve this, Mommy Kyoko~.

Kyoko: *muffled giggles* alright. Bounce me around and play with me, dear. I love it when you do that~.

Rico nods, hanging on tight as they bounce around the mansion for fun, laughing while cuddling on her back, kissing her head while patting her Inflated body. Kyoko moans softly, enjoying his small hands groping her inflated butt cheeks as she would playfully squish him, giving him a big kiss as they make out for a while. Rico cuddles between her breasts, enjoying her kisses while rubbing her erect nipples.

Rico: what do you think about your celebration~?

Kyoko: *muffled* I love it so much. I'm really enjoying my day being a big balloon for you, Rico. It's so relaxing~.

Rico: *smiles* I'm glad to make you happy. You totally deserve this for being the best Mommy detective ever~.

Kyoko: *muffled giggles* and you're my best shota ever for this day. Let Mommy give you kisses on your adorable face~.

Rico: I would love more kisses from you, Mommy Kyoko~.

He leans in, feeling her lips pressing all over his face as he smiles, enjoying her kisses, cuddling again her more. Kyoko giggles, loving Rico so much for making her day more bright after her graduation, and also loving to be his only big detective blimp for the day.