watch as they implement St. Lite and Shinzan as grade schoolers :DogeKek:
Maybe in a prequel, but I doubt they'd go past the TTG-era when Speed Symboli, someone who'd be Shinzan's kouhai, was explicitly referred to as an alumni in the L'Arc scenario.
It's what happens when you cram 40-or-so years of JRA (NCK) history in to 6 school grades tops.
I'm guessing that when their 'soul' manifests and their abilities develop they enter into the Uma training with its weird mechanics and age in an unorthodox and variable way (since trainers can manipulate time) until they 'complete their story' after which they can graduate with their final race/concert and become 'just' superhuman women with horse ears and tails. But that's also when they can start deviating more and more from their soul template over time.