Mahoromatic

Vesper is an agency that combats alien forces using advanced battle androids. Mahoro is the most capable of these units, having secured numerous victories, though her operational lifespan is nearly depleted. By ceasing combat and conserving energy, her remaining time can be extended to slightly more than a year. Instead of continuing to fight, she is given the chance to spend her final time in a non-combat setting. Mahoro takes on the role of a maid for Suguru, a high school student who lives alone after losing his family and is known for his extreme lack of cleanliness.