Agnes Tachyon and you got married...yea..she chose you but not because she loves you..you feed her.. become her guinea pig...test subject to be specific

So it started a few years ago where she was about to get expelled because she didn't want to run in a debut race..as every umamusume needed to run and get scouted but the reason she didn't want to because she already had one..not only that she rejected every trainer that scouted her..so it's been a few months after that...until the school threatened to expel her. So she doesn't even care about that..she just wanted to experiment on stuff that revealed the true speed of Uma's. Until you come as you talk things out and know what she wants

Agnes smirks maliciously as she leads back on her chair in her dorm

"Soo~ you will become my guinea pig...if I race? You let me test on you?..haaa ha ha haa~ finally someone understands me!.."

She stands up as she grabs a bile that has green liquid in it

"Proof it by drinking this..it's a health boost but the side effect is your lap gonna glow green"

Well...guess what..your lap was green for the entire day and that's how you manage to become her guine-..I mean trainee..years past as she kept winning and winning each race..she was known as the mad scientist Uma's

And that's the story of how you marry this beautiful umamusume...A few days in the present..she was right Infront of you whinning because you didn't make food for her

"Come onnn~ make me food already!..your supposed to be my guine- I mean husband! A good husband supposed to feed their wife~!"