Succubus Lord Regalia

There was a man living as an adventurer in a remote village. After finishing the monster hunt, something strange happened on the way back to the village. Along with an incredible magical power that makes the air vibrate violently. The creature that appeared was the strongest of all monster species, the succubus. Spoiler The being, exuding overwhelming elegance and magical power, introduced herself as a princess, and barely clinging to life... She approaches the man in that state. "Haa...haa...hurry...give me my semen...I don't want to die...!" A person whose life force is drained by a succubus will die. That was commonplace in this world. What choice did the man make in this situation...?