Ai and Mai are cute little high school girls who just so happen to be trained in a dozen martial arts so that they can carry out their ancestral tasks of slicing, dicing and generally ruining the day of various demons, devils, and other underworld types. Thing Buffy the Vampire Slayer in a kimono.

Their chief nemesis in Twin Dolls 1 is a muscled, malevolent green guy, who is ringleader to a troop of horny little devils. He seems to spend most of his time laying into Ai and Mai's equally cute classmates with his big ol' broccoli stalk. Ai and Mai do him in after he tries to have his rather forceful way with them.

In TD2, we follow Ai and Mai through basically the same scenario, with a demonic heavy coming to town and building a brook of teenage sex zombies before Ai and Mai punch his ticket.

A pretty cool bit of X-rated anime which fairly begs for a thorough going over at the hands of an adept Freudian.