I would like to ask the name of an animated film, a very good animated film from ten years ago!

There is something called a ring that can be worn on the head. It is originally a foreign race (the headdress of aliens). After wearing it, people can have superpowers and can see through the transformation of foreign races (these foreign races are originally green monsters that lurk around humans for many years, and some of them are different from humans.) The female companion was a student who accidentally got a ring from a mother and son who were in trouble (being chased by others)(she originally stole this boy because it looked good). After she put it on, she found that there were many green people around her. She was very puzzled. Later, the aliens discovered her and followed her... One day, when he returned home, he found that the entire house had been burned down… This is the anime. There are about six episodes. I didn't finish watching it at that time. What's the name of this? Points for answering correctly!