Category: Expansion 38 When body parts grow to unnatural sizes. Breast growth, cock growth, ass expansion, and so on. A type of Transformation Search Expansion stories Suggest category changes All categories Tags in this category breast expansion 31 cock growth 5 ass expansion 4 female expansion 2 expansion 1 Works in category: Expansion Stories 9 Chapters 28 Someone Call Security Chapter in Amazonia University G-Writer Preview: Leo’s heart was pounding and his palms were sweating as he took his dorm assignment envelope and made his way outside, finding a somewhat secluded park bench in the direction of the dorms and hoppi... 4.1K words 620 views 2 April 13, '25 F/M Interactive Reviewed mini-giantess breast expansion ass expansion body odor The Bat's Magically-Embiggened Breasts Chapter in Traveling the Multiverse dellobenedetto Preview: Well, you did promise to Rouge that you'd make her boobs bigger... so best you get that out of the way, huh? Fortunately, you have a number of size-altering spells in your repertoire, including a f... 320 words 280 views March 25, '25 M/F Interactive Open rouge endosoma breast vore breast expansion breast entrapment anthro breast milk size difference smaller male Getting to know Ava a bit better Chapter in Harem Protagonist: CHYOA WritingGuy Preview: *This chapter loosely adapts elements from a couple of Ava's scenes in the original game beta, but isn't a straight adaptation of either.* The day progressed without issue. Class seemed to blur b... 1.5K words 210 views December 21, '24 M/F Interactive Open breast expansion Don't stop (pushing your luck) Chapter in Harem Protagonist: CHYOA WritingGuy Preview: Oh, what the hell? You only lived once, might as well go all in! Besides, you didn't need to overdo it, you didn't need to try to butter Izumi up by offering to carry her books for her or somethin... 1.8K words 260 views November 12, '24 M/F Interactive Open breast expansion huge boobs huge breasts huge tits Ever-growing Izumi Chapter in Harem Protagonist: CHYOA WritingGuy Preview: Written by writing.com user L.Wood You couldn’t help yourself… You had to make Izumi bustier again! She was asleep so you could watch it happen without fear of being caught, she was Bra-less an... 1.2K words 240 views September 28, '24 M/F Interactive Open breast expansion Friends, or something deeper? Chapter in Harem Protagonist: CHYOA WritingGuy Preview: Well, it looked like the game was coming to a close. The girls' team had trounced the boys team, though to be honest it was more like Ai had trounced the boys' team. A few of the other girls had pu... 1.8K words 360 views August 4, '24 M/F Interactive Open breast expansion Pondering the important questions Chapter in Harem Protagonist: CHYOA WritingGuy Preview: The mystery of why Ai's bust had grown more than the other girls you'd spoken too was a true riddle for the ages. And seeing as a good chunk of the day passed by in relative quietness, you were lef... 1.8K words 400 views July 13, '24 M/F Interactive Open breast expansion Another morning encounter Chapter in Harem Protagonist: CHYOA WritingGuy Preview: Written by writing.com user L.Wood. Posted to collaberotica by WritingGuy Hotaru quickly ran off leaving you behind, probably to get some last minute tinkering done on her drone before the scho... 1.4K words 410 views July 12, '24 M/F Interactive Open breast expansion A new day Chapter in Harem Protagonist: CHYOA WritingGuy Preview: It was a little strange feeling so drained after only two short meetings. But then, that was how the integration of the game and your new life must've worked. It would've broken the 'balance' if yo... 1.5K words 490 views May 26, '24 M/F Interactive Open breast expansion Mr. Narrator? A little help here? Chapter in Harem Protagonist: CHYOA WritingGuy Preview: Written by writing.com user L.Wood. While that whole situation of watch a girls boobs grow unbeknownst to herself had been undoubtedly erotic, you really didn’t want to going into this whole si... 1.8K words 580 views May 23, '24 M/F Interactive Open breast expansion Rin and Maki Drink the Milk! Chapter in Love Live! School Idol Size Stories - Definitive Edition! Ninten Preview: Original chapters by EmiyaShirou: As the tomboy eagerly suckled from Nozomi's breasts, the third year noticed Rin's blouse begin to grow tighter to her chest. It seems that her flat chested ... 280 words 530 views April 22, '24 F/F Interactive Reviewed breasts breast milk breastfeeding breast expansion She seems like a nice girl... Chapter in Harem Protagonist: CHYOA WritingGuy Preview: Written by L.Wood. Posted to Collaberotica by WritingGuy. Getting to school was easier said than done… apparently there’d been an accident on the high way so traffic was spilling over into the ... 1.4K words 460 views March 26, '24 Interactive Open breast expansion 1 2 3
