Fics like A Little Sister is All You Need

Oguri Cap, the Star of Kasamatsu, the Ashen Grey Beast, the monstrous eater, the revitalizer of the Japanese racing world. 8 years before, an Oguri retired from the racing scene, content to live out the rest of her days in Kasamatsu. 8 years later, in the present, another Oguri sets foot in Tracen Academy, eager to prove herself in the national scene. Her name is Oguri Roman.

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1. Love // Wave by GrassBlunder (ウマ娘 プリティーダービー | Uma Musume: Pretty Derby (Anime), ウマ娘 プリティーダービー | Uma Musume: Pretty Derby (Video Game))
2. The Creation of an Umamusume by noiku (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))
3. Tracen Portal: Powered by Gallop Learning Management Systems by Pridento (ウマ娘 | Uma Musume - All Media Types, ウマ娘 プリティーダービー | Uma Musume: Pretty Derby (Anime))
4. Umamusume: Mild Discomfort by QualityMatters (ウマ娘 プリティーダービー | Uma Musume: Pretty Derby (Anime), ウマ娘 プリティーダービー | Uma Musume: Pretty Derby (Video Game), more)
5. Frontrunning Love by Agnes_Seey (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), more)
6. "A Mirror World with...horse girls?" by JankIdeas (Limbus Company (Video Game), ウマ娘 プリティーダービー | Uma Musume: Pretty Derby (Video Game), more)
7. Umamusume Pretty Derby: Rise of Team K! by Heavy5Command (ウマ娘 プリティーダービー | Uma Musume: Pretty Derby (Anime), ウマ娘 プリティーダービー | Uma Musume: Pretty Derby (Video Game), more)
8. On a Pale Horse by WrandmWaffles (幼女戦記 | Youjo Senki | Saga of Tanya the Evil - Carlo Zen (Light Novels), ウマ娘 プリティーダービー | Uma Musume: Pretty Derby (Anime), more)
9. How About We End This Race With A Double Crash? by SomethingIsuppose (ウマ娘 プリティーダービー | Uma Musume: Pretty Derby (Anime), Initial D (Anime & Manga), more)
10. It's Not A Mental Illness If We Win by ObsidianNoir (ウマ娘 | Uma Musume - All Media Types, ウマ娘 プリティーダービー | Uma Musume: Pretty Derby (Video Game), more)
11. They are born to run (and love) by Strongest_Pcchi (ウマ娘 プリティーダービー | Uma Musume: Pretty Derby (Video Game), ウマ娘 | Uma Musume - All Media Types)
12. Skittering to the Top by LongDoggos (Parahumans Series - Wildbow, ウマ娘 プリティーダービー | Uma Musume: Pretty Derby (Video Game), more)
13. Re:Running the Tracks by PlutoGottaType (ウマ娘 | Uma Musume - All Media Types, Re:ゼロから始める異世界生活 | Re:Zero Starting Life in Another World (Anime), more)
14. The Tyrant Conquers Parenting by EpicLinkSam (ウマ娘 プリティーダービー | Uma Musume: Pretty Derby (Video Game))
15. What I want my favorite Uma Musume to do to me by Stachelbeeerchen (ウマ娘 プリティーダービー | Uma Musume: Pretty Derby (Video Game), uma musume - Fandom)
16. Trainer's Derby by Maz_of_Sol, WisteriaVT (ウマ娘 プリティーダービー | Uma Musume: Pretty Derby (Anime), ウマ娘 プリティーダービー | Uma Musume: Pretty Derby (Video Game))
17. But She's My Rival! by theDeltaNiner (ウマ娘 プリティーダービー | Uma Musume: Pretty Derby (Anime), ウマ娘 プリティーダービー | Uma Musume: Pretty Derby (Video Game))
18. Emotional Experimentation by Deuceposter (ウマ娘 プリティーダービー | Uma Musume: Pretty Derby (Video Game))
19. A Meteor Can Not Stop The Sun by TheMostCleverBot (ウマ娘 プリティーダービー | Uma Musume: Pretty Derby (Anime), ウマ娘 プリティーダービー | Uma Musume: Pretty Derby (Video Game))
20. KINKTOBER 2025: WLW - FEMSLASH - LESBIAN edition by Noctarya by Noctarya (原神 | Genshin Impact (Video Game), 崩坏：星穹铁道 | Honkai: Star Rail (Video Game), more)