1girl, expressionless, forest, ghost, grass, greyscale, headpat, high-waist_skirt, holding, kneehighs, long_hair, long_sleeves, monochrome, nature, neckerchief, night, night_sky, no_shoes, outdoors, sailor_collar, school_uniform, serafuku, shirt, short_sleeves, sitting, skirt, sky, solo, tree_stump