japanese woman, 21 years old, shoulder-length dark brown hair with bangs falling over left ear, warm brown eyes, large breasts, wide hips, toned female, narrow waist, long black hair, sitting on floor, leaning back, legs spread, holding phone, making v sign with fingers, exposing pussy, inserting black silicone dildo into vagina, pulling her labia apart with hand to widen vaginal opening, face flushed red, looking away from viewer, shy expression, at a office desk, 1girl, solo, 1:1 square, masterpiece, best quality, 8k, hyper-realistic, photography, film grain, natural shadows, soft light leaks, natural light bokeh, medium shot waist-up