Umamusume is an extremely funny series to introduce to someone because not only is the core premise absurd (gijinkas of famous Japanese racehorses who run races that mirror the careers of the horses they're based on while also being idols), but it feels like every other writing and worldbuilding decision is somehow even more absurd than the last
The series takes place at what is ostensibly a high school but the umas have careers that occur years if not decades apart. The umas do not age, no one appears to ever leave Tracen Academy if they don't want to and there is no satisfying explanation for how this works
Despite, again, all of then ostensibly being in high school, some umas act like grown adults who pay taxes and others act like they're no more than 8 years old
Canonically, no one gambles on the uma races.
The creators had to patch some of the story dialogue because they accidentally created a timeline where the modern day Republic of Ireland has a monarchy
Super Creek wants you to do age regression with her because she likes playing mommy
Admire Vega had a twin sister who was aborted in the womb and said dead fetus is now a literal ghost that actively haunts her
Matikanefukukitaru also has a dead sister and she isn't being haunted but she does have religious psychosis
The creators get permission from the owners of all the horses before putting them in the game. The owner of Daiwa Scarlet allegedly approved her inclusion in the game on the one condition that she be given bigger boobs than her main rival, Vodka
Vodka drinks tea from a flask
Agnes Digital writes erotic friend fiction of the other umas
Streets have dedicated uma lanes
The Statue of Liberty is an umamusume
Long phone
Nishino Flower is actually below high school age, but was gifted enough to skip grades
This explanation is used for no other umas who act like elementary schoolers
Unclear if some students are even attending classes bc other umas consider them rare to see
