Nagisa has developed the habit of not wearing a bra at home. Whether it's because she dislikes the feeling of being constricted or simply wants to stay relaxed, even she isn't sure. Her father, however, has recently found his thoughts increasingly consumed by this fact. Though they are family, constantly seeing his daughter's mature breasts as she grows into womanhood has become a strain on both his mind and body. Worse, Nagisa seems aware of his discomfort and has begun acting provocatively toward him. As these days continue, her father can no longer restrain himself and reaches out his hand to touch her bare, braless chest.