1girl, bare_arms, blue_one-piece_swimsuit, breasts, closed_mouth, grey_eyes, grey_hair, holding, idolmaster, idolmaster_cinderella_girls, kobayakawa_sae, looking_at_viewer, medium_breasts, one-piece_swimsuit, ponytail, pool, school_swimsuit, solo, swimsuit, tag_(tf18080512), wading, water, wet, wet_clothes, wet_swimsuit