garuku, black rock shooter (character), hatsune miku, black rock shooter, vocaloid, bad id, bad pixiv id, 1girl, bikini, bikini top only, black hair, black rock shooter (cosplay), blue eyes, blush, breasts, cleavage, cosplay, covering head, embarrassed, female focus, flat chest, hands on own head, hat, hood, hooded jacket, hoodie, jacket, letterboxed, long hair, medium breasts, shy, simple background, solo, swimsuit, twintails