Like Loveless, the anime is way too short (only 4 episodes), but there’s a full manga to explore. (Thankfully, it’s worth it.) The creator, Yun Kouga has also done another outstanding series, Earthian, about gay angels deciding whether or not the Earth is too violent and negative, and should be destroyed. The one downside with Loveless is that it’s only 12 episodes - so if you like the story and want to see what happens, you’ll have to check out the comic book (or manga). When his brother’s friend, Soubi, re-enters the picture, Ritsuka discovers that he and his brother have a special magic, and that they must fight others who also have the magic. However, once someone loses their virginity, they lose their cat ears. In the society, which looks a lot like modern Japan, humans are born with animal features - making them catboys and catgirls.
(At this writing, an Amazon seller has the complete series available on disc for $5.) Loveless is a modern-day fantasy story. Another one that’s unavailable to stream - but Loveless can be found cheaply on DVD.