The little devil who keeps thrusting in the riding position because he gets fined for ejaculating inside her is Inaba Ryuka (HND-817).

Even though there was a penalty for ejaculation inside her, Inaba Ryuka still couldn't stop thrusting in the riding position! With whispers in her ear, the speed of her waist twisting and hip swaying increased! After the man couldn't help but ejaculate inside her, he continued to thrust in the riding position!