1girl, bikini, blush, braid, breasts, brown_hair, cleavage, day, hair_tucking, head_wreath, horizon, idolmaster, idolmaster_shiny_colors, large_breasts, looking_at_viewer, outdoors, pink_bikini, see-through, see-through_sleeves, side-tie_bikini_bottom, smile, solo, swimsuit, tsukioka_kogane, uouokuma, wading