Himeko (Honkai: Star Rail), exquisite facial features, eyes rolled back with tongue out, legs spread apart, hands forming a peace sign, M-shaped pose, private swimming pool, full-body scene, ultra-high definition quality, sensitive content, completely nude except for lace stockings, vulva spread open, anus dilated, clitoris prominent, body hair retained, urethra visible, dominating element, leather collar, face visible from the front