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1. Umamusume: Breeding Derby by NymphoLady

   Fandoms: ウマ娘 プリティーダービー | Uma Musume: Pretty Derby (Video Game), ウマ娘 プリティーダービー | Uma Musume: Pretty Derby (Anime), ウマ娘 シンデレラグレイ | Uma Musume: Cinderella Gray (Anime)  

   • Explicit
   • Creator Chose Not To Use Archive Warnings
   • F/F
   • Work in Progress

   14 Jan 2026

   Tags

   • Creator Chose Not To Use Archive Warnings
   • Daiwa Scarlet/Vodka (Uma Musume)
   • Oguri Cap/Tamamo Cross (Uma Musume)
   • Agnes Digital/King Halo (Uma Musume)
   • Agnes Tachyon/Manhattan Cafe (Uma Musume)
   • Trainer (Uma Musume)
   • Agnes Digital (Uma Musume)
   • Vodka (Uma Musume)
   • Daiwa Scarlet (Uma Musume)
   • Aston Machan (Uma Musume)
   • Horses
   • Horse Girls
   • Horse Racing
   • Futanari
   • Girl Penis
   • girl cock
   • Breeding
   • Smut
   • Shameless Smut
   • Female Trainer (Uma Musume) - Freeform
   • Actually most trainers will be female
   • Yuri
   • Useless Lesbians
   • Breeding Kink
   • Breeding Mount
   • Orgasm
   • Some Umas Have Cocks
   • Not all of them but some do
   • Other Additional Tags to Be Added
   • Creampie
   • Doggy Style
   • Kissing
   • Paizuri
   • Titjob
   • Fellatio
   • Blow Jobs
   • Marathon Sex

   Summary

   In Tracen Academy, some Umas have cocks. Not all of them do, but a good chunk of horse girls have them. With these cocks, come breeding between horse girls. This fic is the adventure of horse girls and...what they'd do if given the ability to breed and fuck one another.

   Language:

   English

   Words:

   7,591

   Chapters:

   3/?

   Comments:

   51

   Kudos:

   268

   Bookmarks:

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