Kiyoka and Miyo make their engagement real and official, but Miyo still worries she lacks the training to be a wife worthy of the Kudo clan. Enter Kiyoka's older sister, Hazuki, who takes it upon herself to tutor Miyo--and tease Kiyoka along the way! Suddenly, Miyo and Kiyoka encounter a mysterious man named Arata Tsuruki. What does he want, and what connection does he have to the enigmatic and powerful Usuba clan that Miyo's mother hailed from?