1girl, bare_shoulders, bikini, bikini_top_only, blue_hair, blush, book, braid, frilled_bikini, frilled_shorts, frills, hair_ribbon, holding, holding_book, idolmaster, idolmaster_million_live!, kousaku, looking_at_viewer, lying, nanao_yuriko, navel, on_back, open_book, pink_bikini, pink_shorts, puffy_shorts, ribbon, short_hair, shorts, solo, swimsuit, yellow_eyes