My-Hime S01 E06 The Passionate Age of 17

Yuuichi and Shiho Munakata enlist Mai, Takumi and Mikoto to help them prepare for a wedding. Shiho worries that Yuuichi likes Mai, and makes Mai root for her love of Yuuichi. Midori Sugiura turns out to be a HiME and ends up as a teacher at the school.