The Story of How I, a Veteran Adventurer, Lost to My Apprentice (♀) in a Dick Battle and Became a Submissive Bitch

A veteran male adventurer takes on a female apprentice, Mina. However, Mina turns out to be a futanari with a massive member. She overpowers him, forcing him into submission. He is stripped of his armor, dressed in humiliating, revealing outfits, and subjected to relentless sexual domination and training, ultimately becoming her obedient sex slave. The veteran adventurer is shown being dominated by his apprentice Mina. He is depicted wearing a chastity device and a collar, while Mina holds his leash.