Professor Nyanya (Blue Archive), monochrome line art, long flowing hair with soft waves messy, distinctive horn-like head accessory slightly askew, flushed face with ecstatic expression, mouth open moaning, eyes rolled back, detailed school uniform completely unbuttoned and falling off shoulders, large breasts fully exposed with hard nipples, pleated skirt hiked up to waist, completely exposed lower body, legs spread extremely wide open on desk, both hands between thighs, fingers buried deep inside herself, cross-section view showing internal anatomy, fingers inside vagina stretching walls, uterus visible with detailed internal texture, vaginal canal filled with fingers, other hand rubbing clitoris with visible internal clitoral structure, juices dripping down, thighs wet, entire body glistening with sweat, delicate but explicit shading on internal organs and skin, anime style, clean anatomical lines, hardcore explicit internal view, intense pleasure expression, high-quality illustration, character design, dramatic soft lighting on curves, intricate messy hair strands, studio-quality rendering, 8k.