1girl, black_hair, black_socks, blush, breasts, cleavage, collarbone, competition_swimsuit, covered_navel, idolmaster, idolmaster_shiny_colors, kneeling, large_breasts, long_hair, looking_at_viewer, one-piece_swimsuit, open_clothes, open_shirt, ponytail, sateridas, shirase_sakuya, shirt, simple_background, socks, solo, swimsuit, unfinished, very_long_hair, white_shirt