Synopsis: Mai and Ai Amatsu are beautiful and powerful twin sisters descended from a Tennyo angel. However, part of this legacy includes fighting off sex-starved demons and protecting the child-like boy Onimaro from evil forces. Can Mai and Ai carry out their mission in life and retain their chastity at the same time?
Review: A long time ago, a mortal man spied upon a beautiful Tennyo angel bathing and fell instantly in love. He hid her garments so she could not go back to the heavens from where she came (Sound like "Ayashi no Ceres"? But this anime actually got released before Ceres!). Anyhow, the man asked the angel to marry him, and they had a pair of twin daughters -- which are the ancestors of the Amatsu family. But they also had a son, and this son got adopted by the royal family. He grew up to be an intelligent and well-respected man, but jealous colleagues eventually caused his downfall. The child-like boy Onimaro that the Amastus are supposed to protect is that fallen man's grandson.
Twin Dolls is about Mai and Ai Amatsu, a couple of pretty teenage girls who've been trained since childhood to fight and channel their divine powers. Mai is highly skilled with the glaive, while Ai is adept with the bow and arrow. Mai and Ai are the latest in the Amatsu line of twin sisters tasked with keeping demons at bay while protecting their fellow Tennyo descendant Onimaro. Mai and Ai are about as opposite as the stereotypical twin sisters go -- Mai is friendly, Ai is aloof; Mai is easily distracted to the point of being ditzy, Ai is always cool and collected.
The main fault I found in Twin Dolls is the fact that it's extremely redundant. The two episodes that comprise this series have the same basic story: some horny ancient demon wants to be resurrected so he can take over the world and have lots of sex slaves. What's more, the episodes also share the same sequence of events: demons want to get the twins, demons possess some female classmates, stupid Mai falls into the demons' trap, Ai goes to the rescue, and the twins whip some demon butt. The premise for which everything happens is nothing but an excuse to show heaps of monster rape scenes.
The art and animation are quite good. Mai and Ai look attractive enough, and their fight scenes are characterized by graceful yet agile movements -- especially when they execute their ultimate attack, a holy dance that can wipe out even the strongest of demons. Sex is depicted very graphically, consisting exclusively of explicit monster rape scenes with only a bit of masturbation thrown in. Aside from their gigantic penises, the monsters use their horns, tongues, and just about any anatomical part which can be inserted into the girls' orifices. If you're into this kind of thing, you'll surely have a ball with Twin Dolls.
Twin Dolls had a lot of potential, with its Ayashi no Ceres-esque background story and nicely rendered visuals. That potential is not realized though, and I'd recommend Twin Dolls only if: a. you can get over its repetitiveness; and b. you like watching monsters ravage innocuous young schoolgirls. It is a somewhat above average effort at hentai though.
Miscellanies: Can't get enough of Twin Dolls? There is a sequel in the form of "Twin Angels". I don't know why they released only Twin Angels on DVD, and not this.