Yuki Mihane is a well-regarded executive secretary with a small, attractive face and enormous tits, but she hides a secret from everyone. While the president talks to a client beside her, she squirms with a vibrator inside her pussy. Beneath her suit she is braless, pantyless, and bound in a tight rope harness that digs into her curvy body. Following the president's orders, she is fucked from behind in his office while still tied up, moaning as her huge tits bounce. She takes a generous creampie deep inside, then carries on with another day of flawless secretarial work.