Messing with Oscar-Ozma's cane accidentally brought the girl to another world: That of Harry Potter! Ruby, Weiss, Blake and Yang may have to team with Harry, Ron and Hermione and save the world, while finding their way back home. Any year, you can take any role.

https://www.reddit.com/r/RWBY/comments/cgrz6h/rwby_at_hogwarts_kaxiew/