1girl, ?, bikini, blush, breasts, brown_eyes, brown_hair, bursting_breasts, cleavage, from_side, huge_breasts, idolmaster, idolmaster_cinderella_girls, katagiri_sanae, low_twintails, nose_blush, oruka_(kamituki0827), short_twintails, side-tie_bikini_bottom, solo, stomach, strap_gap, sweat, swimsuit, thick_thighs, thighs, twintails, white_bikini