1girl, barefoot, bikini, bikini_skirt, closed_eyes, feet, frilled_bikini, frills, full_body, grey_hair, hat, idolmaster, idolmaster_cinderella_girls, kawaseki, leg_up, legs, navel, open_mouth, otokura_yuuki, pink_bikini, short_hair, smile, soles, solo, sun_hat, sunlight, swimsuit, thigh_gap, toes