"Airi-chan~!" That voice was oh-so familiar. All too familiar, even. "You're waddling too fast!" Hinomori Shizuku giggled as she jogged to catch up with the waddling girl, squeezing her ass-flab as she finally rounded on her impeccably round waist.
"Ugh…" Momoi Airi didn't stop. If she stopped, then Shizuku would only take advantage of her again. She wheezed as she heaved herself forwards, struggling to open the gap between them by even a few inches. "Shizuku, p-please…" With sweat beading her forehead, Airi's belly began to gurgle as the stress got to her.
Shizuku pouted in response, turning her speed up another notch and coming to stand in front of Airi. As wide as the larger girl was, there was no passing Shizuku when she wanted to stay in control. "Shizuku!" Airi squeaked, having tried to sound commanding but just ending up making a pathetic noise instead. "I need to… Get to the stage." With a rub of her belly, Airi covered herself up — just in case Shizuku decided to strike.
Shizuku giggled again, moving in on Airi's titanic body and beginning to grope up her generous fat-rolls. She blushed as she did so, almost hypnotized by the simple act of feeling-up her girlfriend. "Airi-chan," she snickered, as her finger began to dib into one of the girl's multiple blubber-folds. "How many times have I told you?" Pulling herself in close, Shizuku attempted a loving smile. "You don't need to lose weight."
Airi wasn't convinced. Shizuku just looked like she was sneering at her. "I do need to lose weight…" She huffed, trying to push the girl off of her but failing as her plushy hands and thick arms failed to achieve even a fraction of the strength expected of a normal idol. "Even gaining idols need to keep a hand on it…" She huffed, looking down at her peach-shaped body and sighing.
Being More More Jump's premiere gaining idol, Momoi Airi had simply inflated with fat, plumping up until she popped out of her outfits and sagged about on stage. She did her best to make peace signs, and wink her eyes, but with her size she just looked like she was failing around most of the time. As Airi had grown though, there had been other changes in the group, too; Airi's girlfriend had awakened to the fact that she actually adored bigger girls. In seconds flat, Shizuku had become obsessed with all things fat, and all things fattening. She'd thrust and pushed no end of food into Airi's mouth, molesting and overwhelming her whenever possible. She groped her ass; she kissed her tummy; she pushed her to the ground and simply had her way with her.
With Airi having eclipsed a solid peach-shape, she was almost entirely incapable of fighting back against Shizuku's wiles. Whenever she saw her, Airi's whole body lit up as the memories of her inspections came flooding back. The fat-rolls beneath Airi's boobs always felt the hottest; Shizuku had shoved her face in there no end of times, sniffing up the sodden, sweaty air like it was ambrosia.
"If I get even…" Airi grumbled, knowing that talking about her size would just excite Shizuku even more. "If I get even fatter, then I'll struggle to stand on stage." She tried to pull her outfit tight, sorting it out and making sure that as little fat as possible was oozing out of the seams. "And I'll tear my clothes. Again."
Airi had been perfectly correct; Shizuku trembled with glee, from head to toe, as Airi despaired over her size. "Nngh!!" She moaned, dragging herself somehow even closer into Airi's embrace, until she could slip a hand up into the girl's cramped sports-bra. "Get fatter, please, Airi-chan!" She sobbed, rubbing the huge belly she was all-but thrusting herself against.
"No." Airi shook her head, planting a foot on the ground as Shizuku tickled her cleavage and continued to examine her belly with her fingertips. "No fatter. Two-hundred kilos is enough." Airi sighed as she watched Shizuku shiver with glee at hearing just how heavy her girlfriend was.
"Two-hundred and one? Is that too much?" She pretend-pouted, crooning over Airi as she swaddled in the girl's sweat. As a gigantic girl, Airi pumped out no end of the stuff; everything she did was thoroughly exhausting. Whenever she stood, she found herself dripping thick driplets of sweat as soon as she sat back down. "Two-hundred and ten, maybe?" Shizuku chuckled as she left Airi's armpits begin to grow even darker with the stuff. Teasing her girlfriend was always the key to making her sweat. "We can even make you bigger in the SEKAI, can't we?" With a wink, Shizuku pictured it; forcibly transforming her own girlfriend into a heaving blob without a wink of consent, and then having her mobile once again when they returned to the real world — mobile, but perhaps a little mad at her.
"How many times do I need to tell you?!" Airi chided, almost snapping at Shizuku as the girl attempted to engulf her. Like a snake, Shizuku was curling her every limb around Airi's plumpness, squeezing ever-tighter every time she got hot. "Nngh!" Airi belched as she felt Shizuku tighten around her tummy, the thick fat there already constricted by her skimpy, too-small stage outfit. "You're such a — Ouuurpp! — such a jerk, Shizuku!" She yelped, struggling to stand as Shizuku began to stroke her peachy-red curves.
Airi's balance wasn't especially good, with how obese she'd gotten. She could barely see past her boobs; looking at the floor was all but impossible. "Miku!!" She howled, all of a sudden, as Shizuku's fingers dug her belly-button out of her panties and began to tickle it. Airi's belly-button always oozed sweat, becoming the stinkiest, dampest thing on the girl's whole body. Airi, red-faced and outraged, called again. "Do it!!"
"Huh?" Shizuku's head cocked. "What do you mean, Airi-chan?" Suddenly, she fell off of Airi, and clean onto the floor. With a squeak, she looked at herself. "H-Huh?!" Repeating herself, only with a far different intonation, Shizuku began to pale as she glanced at her hands. Her plump, thickening hands. Every part of her body was puffing up, as Airi herself grew slimmer. She was already so slim, in fact, that she could finally look down at Shizuku once more.
With a shred of her long-lost dignity returning to Airi's face, she breathed a sigh of relief as her whole body became lighter. "How's it feel," she grinned, stepping forwards to stand next to Shizuku's form on the floor. "How's it feel, fatso?" She laughed, her belly no longer jiggling as she did. Proud and puffed-up with delight, she knelt down to prod at the gradually thickening fat-stack her girlfriend was becoming. "Fatso…" She repeated, letting Shizuku's blubber ooze about in her hands. It'd only been a few seconds, but Airi was already adoring how far the scales had shifted; in her favour, no less.
