Gensokyo Yakyuu Musume
I saw Evirus’s post on Taishou Baseball Girls, about a girls’ school in 1925 which starts a baseball team because they heard about it on the radio, or something. So I went to read some of the manga, and found the main characters looked totally different; their moefication for the anime kind of reminds me of some people…
Also no baseball has actually happened in the first 5 manga chapters, but the girls did say “gokigenyou” a lot, and that’s what counts. I think the manga artist might be adapting something else and trying to justify its plot holes – the backgrounds and stuff seem pretty period-accurate, but in chapter 3 the first girl up there invents aluminum baseball bats(!?!).
And like half of them are wearing clothes that weren’t popular or even invented yet…