Riona was born into affluence, but her childhood was marred by her mother's untimely death. Raised solely by her father, Riona felt lonely even amid her many peers and a cherished partner at her girl's school. Her father's busy schedule only added to Riona's isolation, until one day he brought home a housemaid robot. Little did Riona know, this purchase would spark a dramatic tale of love and passion between herself, an envious classmate named Folty, and the oblivious robot.