1girl, alternate_costume, anastasia_(idolmaster), armpits, bare_shoulders, bikini, blue_eyes, blush, breasts, cleavage, collarbone, curled_fingers, expressionless, floating, floating_object, flower, frilled_bikini, frilled_tankini, frills, hair_between_eyes, hair_flower, hair_ornament, idolmaster, idolmaster_cinderella_girls, light_blush, light_reflection_(water), long_bangs, looking_at_viewer, lying, medium_breasts, navel, on_back, open_mouth, plaid, plaid_bikini, rum_raisin_(chihiromakita19), shirt, short_hair, skirt, solo, swimsuit, tankini, thick_eyelashes, water, water_drop, white_hair, white_shirt