1girl, arms_behind_back, black_hair, blue_eyes, blunt_bangs, bra, breasts, closed_mouth, collarbone, gradient_background, grey_background, hiroki_(yyqw7151), looking_to_the_side, navel, original, panties, small_breasts, solo, twintails, underwear, underwear_only, white_bra, white_panties