Mahoro has just 398 days left to live. A military android created by VESPER to combat the alien menace of the Saint, her operational lifecycle is winding down. With just over a year to go, she is given the choice to retire from active service and do anything she wishes in her last days. Her unexpected choice, however, is to serve as maid and bodyguard to a very surprised teenage boy!

Troubles you can only dream of... Suguru's horrible cleaning skills have his friends calling his home the "haunted house", and being an orphan, he needs help! Enter Mahoro, a beautiful 19-year old that catches bullets in her fingers, claims to be an android, and who wants to be his maid!

Troubles you can only dream of... Suguru's horrible cleaning skills have his friends calling his home the "haunted house," and being an orphan, he needs help! Enter Mahoro, a beautiful 19-year old that catches bullets in her fingers, claims to be an android, and who wants to be his maid!

As Mahoro's life timer rapidly approaches her two hundred and fiftieth day, a more joyous chronological observance occurs to distract her: the 120th anniversary of the founding of the town of Hiryushi. As part of the celebration, Suguru, Miyuki, Hamaji, and several other friends have come up with the perfect tribute: a Maid Cafe! Unfortunately, their Maid Cafe may end up completely Maid-less, as Mahoro and Minawa are attacked by Management forces under the command of Feldrance!

Who's Minawa? Just as life finally returns to 'normal', a new girl shows up spying on Suguru. Who is she? Another combat android?! Who could she be working for? A new mystery besets our friends as Sugur and Mahoro try to determine whom this clumsy and shy android could be. In the meantime, Mahoro has adopted her as a little sister and a maid in training.