Wait, seriously? Out of everything, school uniforms are a problem? That's so random!
Yeah, school uniforms in a "grey zone" that steam doesn't want to deal with.
Which is fine, I get that, but the biggest issue for me is that it seems to be a dice roll depending on who you get to review your game since there are plenty of examples of 18+ games with school uniforms/school settings on steam. Latest example being "Star Knightess Aura" which is in a school setting and has school uniforms, but likely got past the reviewers since the first 15 minutes of the game doesn't take place in a school.
Not a rag on Star Knightess it's great corruption game, just using that as an example.