(masterpiece), matsumoto kouko, long hair, black hair, grayish-brown eyes, 1girl, smile, blush, shirt, solo, white shirt, curtains, upper body, indoors

low quality, bad anatomy, bad proportions, extra legs, deformed anatomy, messy color, deformed fingers, distracted, sketch, censored, muscular, realistic, 3d, signature, loli, underage, abs, ribs