Mahoromatic

Suguru Misato, a young teen boy living by himself since his parents have passed away a few years ago, decides to hire a maid to help clean up his house. Enter Mahoro, a former combat android created to defend the Earth against a secret alien invasion in the early 1980's. Given the choice of continuing in her service for Vesper and functioning for a mere 37 days or retiring, giving up her combat armor and continuing to function for 398 days, Mahoro has chosen to serve as a maid to one Suguru Misato.

Slash still seems to hate Ryuuga. He follows him all day, while Ryuuga gets his school teacher job back. Just as Ryuuga is about to teleport back up to his station, Slash confronts him, and they begin fighting. Mahoro busts in and stops them. She lectures them a bit, and then runs off chasing Suguru. The next day, Mahoro is going shopping, and Suguru is supposed to help her, but they end up meeting this small girl, who is being chased by mecha robots out to kill her. She is an android, and they seem to want her dead. So Mahoro protects her.