Lots of manga get an anime adaption, and pretty often the anime's story deviates partly or a lot from the story told in the manga. This usually leads to different endings lacking information, or even giving surplus information as compared to the manga with the same name.

But this also made me wonder: is there also an anime that shares the same name as a manga (it supposedly was based on) but deviates 100% from this the story as told in the manga? So the story in the anime is totally different from the manga, but still shares the same name.