Beat Angel Escalayer (2002)

Kouenji Sayuka is an Escalayer, a guardian android powered by a "Doki Doki Dynamo" that gives her super powers when she's turned on. But when lesbian sex with her able assistant Madoka stops doing the trick, Sayuka needs some help to save the world. To make matters worse, the forces of darkness have sent a new android to earth, and she's equipped with some "optional extras" attached. Enter Yanase Kyouhei, a young student with no shortage of bedmates. Can Kyouhei bring Sayuka to new heights of pleasure before her new enemy attacks?