1girl, aketa_mikoto, bikini, black_bikini, blush, breasts, cleavage, collarbone, eyewear_on_head, gradient_hair, hair_over_shoulder, head_tilt, idolmaster, idolmaster_shiny_colors, kirou_(kiruyuu1210), large_breasts, looking_at_viewer, multicolored_hair, navel, outdoors, see-through, side_ponytail, solo, swimsuit, tinted_eyewear, upper_body