After being laid off from his job, Jiro returns to his parents' house for the first time in several years to visit his brother. When he arrives at the house, his niece, who has grown up, greets him at the front door. Jiro is surprised at how much his niece has changed and how her breasts have grown. When he tries to get into the bath, she begs him to join her. When they are in the living room, she asks if she wants to play with him. When he gets into bed, she hugs his pillow, wanting to sleep with him. His niece hasn't changed at all since the old days, but her body has completely transformed into that of an adult. Unable to contain his excitement, Jiro finally becomes his niece...