shiro youduki, original, commentary request, 1girl, beret, black sailor collar, black shoes, black skirt, envelope, feathered wings, frilled skirt, frills, green hat, green shirt, hat, holding, holding envelope, letter, long hair, long sleeves, open mouth, red eyes, sailor collar, sailor shirt, shirt, shoes, sitting, skirt, solo, thighhighs, twintails, white hair, white thighhighs, white wings, wings