Amu is an orphan after being abandoned by her parents for not being perfect when she was 11.

Before she was born her parents got doctors to do tests to make Amu perfect. Pink hair, golden eyes, straight white teeth, great at sports, cooking, drawing, and singing, and to have a great personality. Amu was all that until she turned 11. She had the appearance and skills, but she hated it, so her personality changed and she became cold and distant.

Her parents decided to have another child and abandoned Amu on the street and left her. She is now 16, and goes to Seiyuu Academy. She hates it when people compliment her, and says that she's perfect.

She lives with her foster brother, who is 19. His name is Souma Kukai, who is protective of Amu. When a she meets Tsukiyomi Ikuto, a boy who doesn't care about anything, she wonders who she really is as a person.