1girl, ahoge, arm_up, armpits, asakura_toru, bikini, black_bikini, breasts, cleavage, collarbone, gyo_hasu, hair_tucking, idolmaster, idolmaster_shiny_colors, innertube, light_purple_hair, looking_at_viewer, medium_breasts, navel, outdoors, short_hair, smile, solo, swimsuit, wading, water_drop