The Tentacle-1 Grand Prix is a battle among engineers seeking national supremacy with their custom-built tentacle machines. Rival companies attack female employees with their inventions and compete to see who can provoke the strongest reactions. Yuna Ogura’s hypersensitive body is tormented until her nipples stay hard; after being drenched in milky fluid, she becomes even more sensitive. The tentacles plunge into her soaked pussy, triggering an unstoppable flood of squirting.