The Takeda family has been a distinguished family that has had a brilliant career in ballet for generations. Their daughter, Elena, has only just started ballet, but is suddenly cast in a performance. However, it is an erotic ballet called "dark ballet" that is different from the usual performances... Elena is at the mercy of fate, but her potential gradually awakens through full-scale anal training, including anal expansion, bondage, anal hooks, toy torture, enemas, and double hole fuck. Her flexible body weaves obscene ballet and acrobatic fuck. What is required is eroticism, not technique.