Rain, The CEO of the entertainment company J.Tune also the famous actor/singer was in need of a new manager for his boy band; MBLAQ. He wanted the boys to experience what's it like living with a girl around their age. And it was the perfect job for his childhood best friend Delia. She then travels back to Korea where she meets Yang Seungho the leader of MBLAQ, her life after that, turned upside down.