2girls, black jacket, boots, brown hair, closed eyes, dappled sunlight, garrison cap, grass, hands on stomach, hat, hat removed, headwear removed, incest, jacket, knee boots, kneehighs, kuromorimine military uniform, long sleeves, lying, medium hair, military, military uniform, multiple girls, red skirt, siblings, sisters, skirt, sleeping, smile, socks, sunlight, tree, uniform, yuri