oki charcoal, original, absurdres, highres, 1boy, back tattoo, black eyes, black hair, black nails, ear piercing, earrings, finger in own mouth, fingernails, greyscale, hair between eyes, jacket, jewelry, looking at viewer, male focus, monochrome, multiple rings, open mouth, piercing, punk, ring, sharp teeth, sharp teeth-kun (houkago play), short hair, simple background, sleeveless, smile, solo, tattoo, teeth, tongue, tongue piercing, upper body