1girl, bed_sheet, belt, blue_dress, blue_ribbon, blush, brown_belt, brown_eyes, brown_hair, buttons, collarbone, dress, finger_to_mouth, flat_chest, frilled_dress, frills, hand_up, heart, hosizora_mikoto, idolmaster, idolmaster_cinderella_girls, long_hair, looking_at_viewer, lying, on_bed, open_collar, ribbon, sidelocks, sleeveless, sleeveless_dress, smile, solo, tachibana_arisu, thighs