Yukiha's childhood friend who he had a crush on for a long time.

Every morning, Yukitsuki visits Yukiha's house to wake him up. Eventually, she started making him breakfast because of their relationship. After she rejected Yukiha's confession, they became separated with each other.

She always consults with Shirasagi Eri, her best friend, about her relationship problems.

With Miu's involvement in Yukiha's life, the people around him start to be wary of Yukitsuki's actions and behaviors throughout the story.