1girl, all_fours, amochin, bikini, black_choker, black_hair, blush, breasts, choker, cleavage, hair_between_eyes, halterneck, idolmaster, idolmaster_shiny_colors, large_breasts, light_smile, long_hair, looking_at_viewer, ponytail, red_bikini, shirase_sakuya, solo, string_bikini, swimsuit, very_long_hair, wading, water_drop