When Lady Sayuri looked up to see his face. What she saw was not what she was expecting. In fact, it was far from it. She had never needed to bring out this technique when dealing with a human before. And even when she did, she did it because of fun and stubbornness of the other species who were mostly demons.
And Back then, they usually had an expression that showed that they were running mad with pleasure. Saliva running down the sides of the mouth, their eyes in a daze and their body spasming with too much pleasure for them to bear.
Those that thought they were strong enough had fainted and those that were not so strong had died of pleasure. Even the human that came all those years ago to take over this dungeon did not dare take her to his bed and even he craved to mount her.
As far as she was concerned, there was no one is this world that could withstand such a technique. After all, she had been a student of the Succubus queen and had trained under her.