1girl, solo, from behind, back view, japanese woman, 21 years old, shoulder-length dark brown bob with inward c-curl, large breasts, wide hips, toned female, narrow waist, sitting on a desk with legs slightly spread, wearing a white skin-tight g-string plugsuit with g-string cut at hips, exposed buttocks, latex-like fitted material on torso, white sneakers, dog collar, at a office, 1:1 square, masterpiece, best quality, 8k, hyper-realistic, photography, film grain, natural shadows, soft light leaks, natural light bokeh, medium shot waist-up