1girl, arknights, arm support, bangs, bare shoulders, black dress, black nails, breasts, bridal gauntlets, cleavage, clothes lift, dress, dress lift, earrings, frilled dress, frills, grey hair, hair ornament, horns, jewelry, large breasts, lifted by self, long hair, looking at viewer, lying, mudrock (arknights), mudrock (obsidian) (arknights), necklace, no panties, official alternate costume, on back, open mouth, partially visible vulva, pillow, pointy ears, red eyes, ru zhai, school uniform, skindentation, solo, spread legs, thigh strap, very long hair