3girls, o, ahoge, akagi_miria, armpits, bed_sheet, bikini, black_hair, blonde_hair, blue_neckerchief, blue_sailor_collar, blush, brown_eyes, brown_hair, collarbone, dot_nose, e_sen_a1000, flat_chest, from_above, green_eyes, hair_ribbon, hands_up, idolmaster, idolmaster_cinderella_girls, interlocked_fingers, koseki_reina, legs, long_hair, looking_at_viewer, low_twintails, lying, medium_hair, multiple_girls, neckerchief, on_bed, open_mouth, purple_eyes, ribbon, sailor_bikini, sailor_collar, sailor_swimsuit_(idolmaster), short_hair, short_twintails, sidelocks, smile, swimsuit, thighs, twintails, white_bikini, yusa_kozue