[quote="Claraviolet" pid='264022' dateline='1631982943']
That sounds kinda cool
Not may stories would actually elaborate the side character story... Well 12-13 episodes anime, anyway
[/quote]
All 3 Railgun seasons are 25 episodes. Also they were trying to milk the popularity of A Certain Magical Index (Railgun’s a spinoff), so they didn’t have enough source material at the time, so they took a ton of creative liberties.
I think it worked fine for season 1 being mostly anime original, as the first arc the manga adapted wasn’t very long, and had a lot of wiggle room for extra additions.
Ironically despite it being a spinoff, Railgun seems a bit more popular than Index sometimes, and I think it’s because it’s easier to get into. Index’s first arc is kind of a pain, because the first arc is basically the exposition for the whole world, whereas Railgun can be explained in like 5 mins.