1girl, backpack, bag, beach, bikini, bikini_shorts, black_hair, blue_sky, cloud, day, fangs, fukumaru_koito, hair_bun, hair_down, hair_ornament, hairclip, idolmaster, idolmaster_shiny_colors, looking_at_viewer, looking_down, navel, ocean, okano_yuuto, one_eye_closed, outdoors, purple_eyes, shorts, skin_fangs, sky, solo, stomach, swimsuit, water, water_gun