When he calls for a delivery health girl, the person who shows up is Amami Ririka, his domineering senior who once gave him strict guidance. It's an awkward reunion, but she seduces the man as both a professional and a woman. Her ripe body and lewd verbal abuse easily destroy the pretense of "no sex." He reverses their positions and experiences the pleasure of making his senior submit on the bed. The sight of her, who was once strong-willed, crying "I'm sorry" as she climaxes during intense thrusts satisfies his desire for dominance to an unparalleled extent. The intense interaction that comes from knowing each other.