No one
Me getting hyper fixated on this game cause I'm autistic and I like horseys

I don't speak Japanese but I'm pretty sure this is the gist of Stay in love's story line.
In all seriousness the fact the IRL horse likely had early onset dementia brought on by inbreeding is nothing short of a tragedy.

As always hope you enjoy and tell me what you think.
Uma Musume owned by Cygames