1girl, o, arm_support, bikini, black_bikini, black_hair, blush, breasts, collarbone, halterneck, idolmaster, idolmaster_shiny_colors, kazano_hiori, kuro_fjmy, long_hair, looking_at_viewer, mole, mole_under_mouth, navel, purple_eyes, simple_background, small_breasts, solo, strapless, swimsuit