>>279635897
>who are the fathers if there are no uma otoko?
Human men
For Special Week, I assume it must have been a virgin birth since she only ever talks about her two mothers and a father is never mentioned

>why are they never seen at the races or in the streets with the uma mothers?
We see Top Road's dad in the ova. The series rarely shows the umas' parents, maybe because they want to focus more on "spiritual" parents based on the real-life horses' relationships (like Rudolf/Teio, Gimlet/Vodka, Tachyon/Scarlet, King Halo/Kawakami Princess etc)

>why do the winners have to perform a humiliation ritual dance?
Canonically this is meant to be a way for umas to show their gratitude towards their fans. It's also a remnant of the early days of the franchise when they were leaning more towards idol stuff

>is it derived from the game?
It was part of the concept from way before the game was released

>is the game a g*cha?
yes