Hirosaki-san is from Aomori Prefecture and has participated in the Inter-High School Championships. She attended a strong sports school where romance was prohibited, so she had her first sexual experience at a late age of 21. She was originally a masturbation maniac, but she became addicted to sex and is now a perverted country girl who has had sex with over 100 people. She usually works at a credit union counter. She has a fair, plump complexion, thick hair, and a body that is easy to give birth to. "I'm good at handling balls... (blushes)"