1girl, o, bad_pixiv_id, bikini, bikini_under_clothes, black_jacket, blurry, blurry_background, blush, breasts, brown_hair, cleavage, collarbone, day, horizon, idolmaster, idolmaster_shiny_colors, jacket, looking_at_viewer, medium_breasts, navel, ocean, osaki_tenka, outdoors, red_bikini, solo, swimsuit, user_whdk2447