Ayasaki Hayate is a sixteen year old boy with a gigantic, almost unpayable debt; in an attempt to pay it off, he's been working as a butler at Sanzen'in Nagi's mansion, together with Nagi's maid Maria. One day, Nagi receives a phone call that might change many things in their lives; she feels inclined to act on it, but this doesn't mean she won't meet resistance. To complicate things even further, meeting a girl who claims to be her sister might turn everything upside down, for Nagi and both her servants alike. — written by Hinoe