2girls, after kiss, animal ears, arknights, beeswax (arknights), breasts, carnelian (arknights), completely nude, dark-skinned female, dark skin, horns, incest, multiple girls, mutual masturbation, nipples, nude, parted lips, red eyes, saliva, saliva trail, siblings, sisters, sotetsumi, sweat, tongue, tongue out, trembling, yellow eyes, yuri