Kazuko

Ayako's classmate from her high school days.
Kazuko is a self-proclaimed model, but she is actually an AV actress who isn't successful.
Back in her hometown she was known to be a calm, humble and quiet type of girl, but once she moved, she has become a lot more flashy. Because of her good looks and secret complex with the protagonist, Kazuko decides to follow Ayako's path and takes on a course to become an AV actress.