One day, a courier arrives to Harunosuke, who is living a smooth life with his lover. What was inside the big box was a naked girl with cat ears!! android. She changed into a maid outfit for service and showed off her naughty features. Yukinosuke, a cute robot sent to the present age to protect the future, draws Harunosuke more and more to his attention... and keep an eye on his love triangle with Kaori!