Professor Nyanya (Blue Archive), vibrant full color illustration, long flowing purple hair messy, horn accessory tilted, tsundere expression with deep red flushed cheeks, looking back at viewer over shoulder with embarrassed but inviting gaze, eyes slightly teary, small floating heart ❤ beside face, detailed school uniform on upper body only, blouse tight across huge chest with buttons undone showing cleavage, lower body completely exposed, bent over in doggy style position, ass facing viewer, anus and clit fully visible, legs spread, thighs marked with正字 tally marks, used condom hanging from her, semen dripping down thigh, "it's not like I wanted this" attitude, denial expression contrasting with position, delicate cel-shaded coloring, anime style, clean lines, explicit rear view, professional rendering, soft pink gradient background, 8k, masterpiece.