Problem with the key to the labyrinth (may contain spoiler)

[Tuplis]

fight the demoness.

[Dror21]

I'm talking about the demoness in the castle Nexy.. i don't have a message or something like that, that gives me that option...

[Tuplis]

if you're talking about the castle with 2 characters in it, the female demon and the key keeper then you have to fight the demoness and after that you can ask the keeper for the key and he will give it. I just went by that part today so I'm pretty sure about this.