Stories in which the growth of someone’s ass (or arse) is significant.
Related: Belly Growth; Breast Expansion; Detachable; Foot Growth; Getting Handsomer; Gradual Change; Increased Libido; Male Pregnancy; Transformation; Voice Deepening.
Child of: Other Physical Changes.
Top Stories: “Above average”; “Bulking”; “Reality Pack”; “Mysterious kidnapping”; “Under control”; “OmniGro”; “Spice up your life”.
Recently Updated: “Spice up your life”.
14 stories found. Total word count: 373,369.
- Above average by Ziel CockUp Cock HyCock HyCum HyMusc MuscUp Musc AssUp Retcon Alan starts out as just your average college boy. Then a strange, magical artifact comes into his life, and he starts becoming bigger… almost remembering the ways things were, when his muscles and cock weren’t, with each orgasm, more and more above average. As the effects spread, Alan knows he must understand what’s happing to him and his friends—and also that he must be the biggest, most muscular, most hypercocked stud of all. Added Apr 2013 Updated Dec 2018 28 parts 130,435 words 218,868 views 4.5 stars (88 votes)
- OmniGro by Whatinsomnia CockUp Cock HyCock NipCum MuscUp Musc AssUp SizeUp Dissatisfied with the speed at which the current OTC dick growing serum works, Eli, a brilliant scientist in his own right, sets out to make his own super-powered serum. Eli wastes no time in breaking in the new concoction on himself and his boyfriend. The results speak for themselves and their new product revolutionizes the world as they know it. Added Mar 2016 3 parts 45,143 words 20,076 views 4.7 stars (7 votes)