Yukarin says, "When I see a man enjoying himself, I really get into it!"—a girl with a hidden carnivorous side. Before the surprise visit, she attempts a practice run on the staff, but things take an unexpected turn!? Intending to teach, she ends up instantly overwhelming the staff member. Riding high on the mood, she heads to the user's place, bouncing her well-shaped breasts as she delivers intense cowgirl-style service. The client, overwhelmed by her passion, reaches full arousal. As he drifts into blissful, dazed satisfaction, she moves toward him to hear his feedback...???