On a business trip, a big-titted office lady who despises her sexually harassing boss is shocked to find herself booked into the same hotel room (ryokan) as him. Despite her hatred and resistance, his unequaled sticky piston thrusts and relentless lust overwhelm her. He pounds her all night long, making her cum repeatedly until she falls into a haze of pleasure and ecstasy amid saliva and love juices in their shared room.