K, a member of the product planning department, is a gentle, bespectacled intellectual type—but surprisingly, she's a filthy office lady who cums instantly from just light touching. Though she acts professionally during work hours, she secretly orchestrates various pranks, including surprise visits to the office. When someone shows her a cock in the staff lounge, she happily takes it into her mouth, and K becomes increasingly aroused by the reaction. In a private evening session, she secretly engages in a threesome, moaning loudly as she's pounded with intense thrusts, climaxing repeatedly. Her true nature reveals a striking contrast: quiet and intelligent at work, but a passionate, dominant office lady behind closed doors.