1girl ass back_cutout bare_arms black_dress blue_archive butterfly_hair_ornament choko_(cup) clothing_cutout cup double_bun dragon_print dress from_behind fuyouchu hair_bun hair_ornament halo highres holding holding_cup kisaki_(blue_archive) long_hair pelvic_curtain simple_background sitting sleeveless sleeveless_dress solo tokkuri twintails very_long_hair white_background