1girl, backpack, bag, barefoot, black_hair, black_shirt, black_skirt, day, facing_away, feet, foot_focus, foreshortening, indoors, legs_up, lying, matsunaga_kouyou, on_bed, on_stomach, original, pillow, pleated_skirt, ponytail, red_sailor_collar, sailor_collar, school_uniform, serafuku, shirt, skirt, soles, solo, sunlight, the_pose, toes, wings