1girl, barefoot, bikini, blurry, blush, breasts, crazy_straw, depth_of_field, drink, drinking_straw, eyelashes, eyewear_on_head, feet, from_behind, idolmaster, idolmaster_shiny_colors, legs, light_smile, looking_at_viewer, looking_back, medium_breasts, medium_hair, purple-tinted_eyewear, purple_eyes, purple_hair, short_twintails, sitting, soaking_feet, solo, swimsuit, tanaka_mamimi, tinted_eyewear, toes, twintails, ushimo_(dztu8434), water