1girl, ahoge, arisugawa_natsuha, ass, barefoot, blush, breasts, collarbone, competition_swimsuit, dutch_angle, idolmaster, idolmaster_shiny_colors, large_breasts, looking_at_viewer, one-piece_swimsuit, orange_hair, pool, sitting, smile, solo, swimsuit, wariza, wavy_hair, wet, wet_hair, yamabuki_ryuu