Violent, gory...nudity...don't be put off...these are merely selling points to the ununsal genre of this anime, which I would describe as more of a 'blue horror' genre.
This is an anime that has complelling characters, and questions the darker side of human nature, its cute, funny, dramatic and will make you cry. It only has 13 epsiodes, plus one special ep...which to my knowledge has not been put on the dvds...
A science experiment gone wrong, namely, a pink haired girl named Lucy is imprisoned in a lab, she manages to escape...along the way slaughtering all of the guards with some unknown invisable force. Before she jumps into the sea to escape, a bullet is fired into the back of her head--not killing her--but messing up her mind to create a second docile peaceful and childlike, other personality--Nyuu.
Lucy--or rather Nyuu is found by two college students, cousins Yuka and Kouta. They call her Nyuu because 'nyuu' is the only thing she can say, she is also naked and also has two horns coming out of her head. (some chobits cliches here a little) they take her home and deicide to look after her. The miltary is looking for the murderous Lucy though. They come to Kouta's door, but for some unknown reason Kouta lies about knowing the whereabouts of Lucy/Nyuu.
The story contiunes on a rather dramatic plot that questions the darker nature of the human mind, and the limits to human evolution. There is moderate violence in this anime, but it is only mostly found in the first epsiode and pivotal episodes, much more of the story focuses on the drama and storyline...
I highly remcommend this anime to anyone, the story is new and excuiting and the plot will surprise you.