Boichi's manga style, 1girl, Monochrome shades of gray, 独奏, sitting, Long hair, upper-body, ((Masterpiece))

(painting by bad-artist-anime:0.9), (painting by bad-artist:0.9), watermark, text, error, blurry, jpeg artifacts, cropped, worst quality, low quality, normal quality, jpeg artifacts, (signature), watermark, username, artist name, (worst quality, low quality:1.4), bad anatomy