1girl, d, blue_one-piece_swimsuit, blush, breasts, brown_eyes, brown_hair, cleavage, collarbone, competition_swimsuit, idolmaster, idolmaster_cinderella_girls, large_breasts, long_hair, looking_at_viewer, nitta_minami, one-piece_swimsuit, open_mouth, smile, solo, standing, swimsuit, thighs, tomajiyama, towel, towel_on_head