Shirakawa Miwa

A female teacher who is the assistant homeroom teacher in the protagonist's class.
She has a serious and straightforward personality. She is also very friendly and treats her students kindly.
She has recently announced her marriage to a man she knows.

She has only had sex with her husband.
She has a strong desire to have children, but is dissatisfied with her husband's indifference and neglect.
She feels that it would be a shame to make an aggressive appeal to her husband, so she is unable to talk to anyone about it.