Satozaki Mayu

A gentle and kind student who is fair even to the protagonist.

On the other hand, she is strong willed enough to not give in to obstacles and difficulties, and is quite stubborn.
She is always relied by by those around her, and is always willing to meet expectations. But sometimes she goes too far, and self-sacrifices herself.
She's been playing the clarinet ever since she was a child and is the head of her school's brass band.

She's interested in sex as anyone, but thinks she's too young to try.