1girl, backpack, bag, bare_shoulders, belt, bikini, bikini_skirt, black_hair, day, fangs, fukumaru_koito, hair_bun, idolmaster, idolmaster_shiny_colors, looking_at_viewer, navel, one_eye_closed, outdoors, purple_eyes, shallow_water, single_hair_bun, single_side_bun, skin_fangs, solo, swimsuit, uouokuma, water, water_gun, wet