1girl, o, ahoge, aqua-skybirds, ass, bare_legs, barefoot, blue_one-piece_swimsuit, blush, clothes_pull, full_body, idolmaster, idolmaster_cinderella_girls, koshimizu_sachiko, looking_at_viewer, looking_back, one-piece_swimsuit, purple_eyes, school_swimsuit, school_uniform, serafuku, simple_background, skirt, skirt_pull, solo, swimsuit, white_background