Depends on were you are, first you have to do his initial quest, then you need to trigger an event informing you about elf prostitutes, then you need to visit the brothel and talk with Helena about it. Then visit the brothel at night until you meet them, after a few lines of dialogue you can help making them more womanly. Since the quest involves fighting slimes, you also need to complete the quests for the guard captain to unlock the lake. As you can see the quest is quite far into the game, I would suggest to just play the game and complete each quest as they show up.Anyone know how to start the quest (Graceful Rebirth) of Dros?