After losing her parents as a child, Aria was brought to a church to be raised by nuns, and every year she receives a gift from the unknown benefactor “Jinguji”. On her sixteenth birthday, he sends another, more unexpected present: an engagement ring and the promise to come and get her!
But Aria’s special day takes a dramatic turn when her life is suddenly threatened by unknown men! To protect her, Jinguji has apparently sent the handsome Canon to be Aria’s bodyguard. Just what kind of dangerous life is Aria about to be plunged in?