Hyper Anus

• Addiction by Hatman  [  ]  “… I gotta have more! I need more! Give… me… MORE!” pleads our young scientist.  •Cock Growth •Huge Cock •Cum inflation •Hyper Cum •Hyper Anus •Stretchy  Added May 2010 1,916 words 29,049 views 3.8 stars (9 votes)

• Best body modification ever by Oneleg Smith  [  ]  Mike meets an unconventional surgeon who specializes in improving your body and making sex better in unexpected ways.  •Cock Growth •Huge Cock •Hyper Anus •Transformation •Rubber/Latex  Added Mar 2019 1,994 words 14,509 views 4.3 stars (6 votes)

• Enlargement by Boston Guy  [  ]  A medical engineer develops nanotechnology that could cure the world of multiple diseases. But his true motivation is not so noble.  •Cock Growth •Huge Balls •Huge Cock •Hyper Cock •Straight to Gay •Muscle Growth •Muscle/Strength •Hyper Anus •Increased Libido •Gradual Change •Transformation •Size Increase •Nanotech •Nonconsensual change •Infectious  Added May 2013 Updated Jun 2013 5 parts 14,943 words 49,196 views 4.5 stars (25 votes)

• Gym story by Kisho Nakamura  [  ]  Alex decides to join a gym. One of the trainers there provides him with something that may aid in his development.  •Cock Growth •Huge Cock •Cum inflation •Muscle Growth •Muscle/Strength •Hyper Anus  Added Jul 2009 4,464 words 19,959 views 4.3 stars (8 votes)

• Just between fiends by Cumguts  [  ]  Regular buff guy Dean is met with an unwanted guest (or two) over breakfast. Things get considerably stickier when he tries to get rid of them.  •Hyper Cock •Cum inflation •Hyper Cum •Muscle Breast •Hyper Anus •Voluptuous Men •Demons  Added Nov 2020 3,422 words 7,002 views 4.6 stars (9 votes)

• Karma pills by Musiker  [  ]  Steve has been bullying the other members of Matt's Gym for ten years. When Matt gives Steve a new kind of muscle-enhancing pill, he conveniently forgets to mention some significant side effects.  •Cock Growth •Cock Shrinking •Cockless •Huge Balls •Huge Cock •Hyper Cum •Getting Dumber •Other Mental Changes •Straight to Gay •Muscle Growth •Muscle/Strength •Hyper Anus •Gradual Change •Getting Taller •Plausible Size Difference •Size Increase •Dom/Sub •Humiliation •Nonconsensual change •Sex-Slave •Bodily Fluids •Anthro/Furry •Mind Control  Added Jun 2019 Updated Jul 2019 5 parts 24,186 words 24,224 views 3.8 stars (17 votes)

• Modern rites by red_king  [  ]  Matt’s life changes forever when he receives divine investiture from an old fertility god, fallen from the pantheon, in exchange for his devotion and cooperation in finding more followers. At first it sounded like work, but soon he’s having too much fun to care.  •Cock Growth •Huge Cock •Hyper Cock •Cum inflation •Hyper Cum •Pec Fucking •Muscle Breast •Muscle Growth •Hyper Anus •Ass Growth •Getting Handsomer •Transformation •Plausible Size Difference •Size Increase •Destruction/Violence •Restraints •Supernatural •Immortality  Added Dec 2018 Updated Jun 2019 15 parts 45,417 words 27,871 views 4.6 stars (32 votes)

• SNU-5|VU by DracumSum  [  ]  Nathan and Nick have to complete a biochem project on the metahumans caused by the failed SNU-5 nanobot project—only they don’t know any, and the brief random encounter Nathan had at a bus stop the other day won’t help them. Or will it?  •Cock Growth •Cut to Uncut •Huge Balls •Huge Cock •Hyper Muscle •Muscle Growth •Hyper Anus •Increased Libido •Foot Growth •Gradual Change •Transformation •Getting Taller •Giants •Plausible Size Difference •Size Increase •Hairless •Nanotech •Infectious •Set in the Future •M/M  Added Feb 2022 6,053 words 4,145 views