In the hidden war against the Saint, mankind has been saved countless times by an android named Mahoro. After her latest battle, Mahoro discovers that if she stays in her full battle mode, she has a limited time of life left to her. If her armaments are removed, Mahoro has a new lease on life and the freedom to live them as she pleases, at least for 398 days. So what
s an android with a little over a year left to do? Enter Suguru, a young orphan, who hires Mahoro on as a maid. Poor Suguru has no idea about Mahoros past life, or her deep connection to him. But he`s not one to complain as Mahoro moves in causing suspicion from his friends, and jealousy from his home-room teacher. Now Suguru just has to decide if his beautiful 19-year old maid is really an android!
The fight with Management Mahoro decides to wage a war effort to confiscate Suguru's "Secret Stash" of dirty books. All out hilarity ensues when she recruits the girls, and it's up to Suguru to organize the boys, protect the stash and save the day!
While Mahoro is teaching everyone how to be a maid for their new store Cafe Trois, Minowa is attacked by the robots from Management.
As Mahoro helps out at Cafe Trois on the opening day, she senses danger. When the robot henchmen close in, Mahoro rushes to Minowa's aid.