A girl in Ayumu's class. Strikingly beautiful, she is usually the top student of her school, and has a quiet willpower and strength. She can relate to what Ayumu is going through. She, like Ayumu, is the victim of teasing by Manami and her gang; but, unlike Ayumu, she does not let it bother her, at least outwardly. She is very independent and mature, and has been known to work multiple shady jobs to make her own way, such as working behind the counter at the risqué Rainbow Café and being a bunny girl at clubs (in the drama, she only works at Rainbow Café, and her being a bunny girl is only hinted at). Like most of her classmates, Miki is about fifteen or sixteen, but she stretches the truth when trying to find work, saying instead that she is nineteen. Not much is known about her life, but it appears that she lives alone. Her parents are divorced because of financial troubles (Miki's father is seriously ill). Her mother is literally never around, and her father's job keeps him from seeing his family. She has a "sweetheart" in her home town. She and Ayumu are best friends, although their feelings could also be interpreted as more than platonic.