The protagonist’s girlfriend who he has just started dating. Neither of them has been in a relationship before, and they’re both quite naive.

Her glasses are one of her most charming features, but her eyesight is exceptionally bad, and she can’t see much of anything without them.

With a studious and accommodating personality, she studies biotechnology at the same university as her boyfriend.

As she doesn’t care much for makeup or flashy outfits, her appearance is rather plain, but her voluptuous bosom is always catching the eyes of boys, making her self-conscious.

Originally hired as Maria’s private tutor, before she knew it she had become Maria’s personal cat-eared maid and pet. At first glance she appears female, but at one time she lived as a man.

While she was initially forced to dress as a girl against her will, now she’s been completely broken in as a woman, and is addicted to having sex with men. That said, her male parts are still fully functional, and thanks to Marie and Maria’s training, she’s thoroughly versed in how to please women as well. However, her usefulness is declining thanks to the excessive pharmaceuticals she’s been subjected to, and the day when she will need to be replaced with a new private tutor is fast approaching.

The CEO of Mamiya Industries. An enticingly beautiful widow.

As Mistress of Black Rose Manor, the family’s holiday estate, she has opted to live there with her daughter Maria for a time, leaving the family’s main estate in the care of her other daughters.

Marie’s beloved daughter. She has inherited her mother’s looks.

A young woman of self-proclaimed beauty, brains, and refinement. Doted upon as the family’s youngest, her spoiled upbringing seems to have made her exceptionally willful and undisciplined.

Her private tutors tend not to last very long around her.

An employee of Black Rose Manor.

A woman with a cold and mysterious masklike exterior, who rarely shows any emotion.
Although ill suited to her quiet demeanor, her chest size surpasses even Marie and Maria’s.