Shirahama Miyuki

Childhood friend. She is the only daughter of the neighbour.
She loves Satoru and tries to spend as much time as possible with him, but since she has a weak will, it's difficult for her to do it. She does not have enough courage to confess because she feels inferior compared to his family.

Spoiler

She gets raped by some delinquents. After they get bored of her, she is forced into prostitution and gets pregnant.