1girl, babydoll, blush, chestnut_mouth, covered_navel, enuma_(uma-festival), half-closed_eyes, hand_on_own_chest, hand_on_own_stomach, idolmaster, idolmaster_cinderella_girls, kusakabe_wakaba, long_hair, looking_at_viewer, lying, monochrome, on_bed, parted_bangs, sepia, solo, thick_eyebrows, upper_body, very_long_hair, wavy_hair