Shinomiya Yurika

She is a school nurse at Aimine private school. Her husband is a surgeon at a university hospital.

They both come from old families, and although it is not a political marriage, they were promised early on that they would be married, and they married without any particular resistance. However, there is no atmosphere of a married life, and they live together only as a couple. They have almost no sexual intercourse and are indifferent to each other.

She has a queenly S-type temperament and prefers younger men. She has an abnormally strong sexual appetite and no moral awareness in that area, so she takes advantage of her position as a school nurse and her good looks that catch everyone's eye to devour her young students.