Fuma Shinobu Reivs. Tentacle Demon & Futanari Kunoichi

Rei, a Fuma ninja, infiltrates a dark corporation to deliver justice, only to be captured by the company's president, who is actually a demon. She is subjected to a mind-control technique and forced to mate with a futanari kunoichi named Lilith, who was previously captured and brainwashed. Rei is ultimately broken by the ordeal, becoming a loyal servant and bearing demonic offspring.