Implicating alternate_hair_length -> alternate_hairstyle.
Reason: I started up an alternate hair length tag as it's something that's not particularly easy to filter out with the usual searches (tainaka_ritsu long_hair alternate_hairstyle for instance turns up a good number of images that are not Ritsu with long hair). It's a type of alternate hairstyle, though, so needs an implication.
Updated by jxh2154