1girl bangs bare_shoulders between_legs black-haired_demon_girl_(shimmer) black_hair black_shirt black_thighhighs blush breasts closed_mouth collarbone demon_girl demon_horns demon_tail halo hand_up heart heart-shaped_pupils highres horns looking_at_viewer medium_breasts medium_hair off-shoulder_shirt off_shoulder original pleated_skirt red_eyes red_horns red_skirt seiza shimmer shirt shirt_tucked_in short_sleeves simple_background sitting skirt solo speech_bubble symbol-shaped_pupils tail thighhighs trembling