The "lifestyle" mentioned refers to the , which you can explore further through resources like:
You are the listener (usually a shy Otaku or a salary man at a izakaya ). The J Kuro Gyaru notices your gaze lingering on her leopard-print mini skirt or her exposed ura nape. Instead of ignoring you, she confronts you. J Kuro Gyaru x Shota -Sakki Miteta yo ne - -RJ...
, a high-energy high school girl with deep-tanned skin, bleached hair, and a playfully aggressive attitude. The "lifestyle" mentioned refers to the , which