Hanasaki Ian, a beautiful office lady working in Marunouchi, takes on anal for the first time! She's gotten hornier with age, and this time she volunteered to have anal sex! "I wondered what would happen if I had sex with my ass, and it felt good? I wondered..." She takes on the challenge with the best lineup to transform into a beautiful woman who can have sex through her asshole! Starting with an embarrassing interview about enduring an enema, she experiences a brain-shaking climax with her first anal sex and first double-hole sex!