She is the daughter of a well-to-do family with a gentle, easygoing personality. She met her husband through an arranged marriage.
There is a 15-year age difference between them. She ended up marrying him after being swayed by her enthusiastic father.
She has a strong sex drive, but her husband is too busy with work, so they haven’t been intimate recently. Due to the age difference, she secretly resents the fact that he can't satisfy her desires.
She was hit on by a man and, in a moment of weakness, was about to be taken to a love hotel when the protagonist witnessed it. Under the pretext of “keeping it a secret,” she has a physical relationship with the protagonist.
[From
official site]