Avalon'S Dungeon (www-readlightnovel-me)

The protagonist, who has accidentally acquired a bizarre manhood, is sobbing because even prostit**es are running away from him. But one day, he receives an order from his father, the king. The order is: “Conquer Avalon’s dungeon!”. In that dungeon, created by an ancient mage, may lie the hidden treasure that will res…