they do running races and I guess fill the space of regular racing horses in this world, which is just japan but with barely teenage girls with horse ears are the biggest celebs with super important races and huge musical events, even though mostly they just go to regular schools and get into minor slapstick. I never watched it, I dont even do the things i want to do, but Id like to think every time one trips over while dashing to school with toast in their mouth a dude shoots them in the head
also I think theyre all reincarnations of dead earth racehorses? I dont know. anime is blood