The Story of the Strongest Witch Being Defeated by Energy Drain

An S-rank witch adventurer enters a dangerous cave to investigate a series of missing adventurers. Deep inside, she encounters a powerful tentacle monster that quickly captures her. The creature drains her magical energy directly through her breasts and genitals, rendering her completely helpless and overwhelmed by intense pleasure. Ultimately, the witch suffers a total defeat. Stripped of her magic, she is bound to the cave wall alongside the other captured adventurers to serve as a permanent energy source for the monster.