Intellectual and composed, the beautiful literary-type girl, Arisu Nao, hides a fierce desire to dominate men and lead them to pleasure beneath her plain appearance. Treating an older man like her pet, she repeatedly taunts him with verbal abuse, kisses, and handjob, then mounts him in a dominant cowgirl position for intense sex. Teasing him with filthy words, she drives him toward ultimate climax. Her distorted expressions and moans throughout the act perfectly embody the peak of ecstasy.