3girls, ahoge, aqua_one-piece_swimsuit, bikini, blonde_hair, blue_bikini, blue_hair, brown_hair, casual_one-piece_swimsuit, closed_eyes, frilled_one-piece_swimsuit, frills, hair_bun, idolmaster, idolmaster_cinderella_girls, kawaseki, looking_at_viewer, multiple_girls, one-piece_swimsuit, open_mouth, pink_one-piece_swimsuit, sajo_yukimi, sidelocks, simple_background, sitting, sketch, smile, swimsuit, takamori_aiko, twintails, waving, white_background, yusa_kozue