Talk:Rance 6:Walkthrough/@comment-49.144.20.235-20170121095713/@comment-26883980-20170121101254

I seem to recall it being only available in the post game. At some point you get a quest to restore her to normal, doing that will send you on a quest to the top of her tower, then down into the basement again where you eventually enter one of the rooms that was previously inaccessible.