Edit: Found a simple workaround for the dungeon lockout. To advance the story by five days, in the main menu beneathe the Run The Gauntlet option, click on the link that reads "Skip to the cut game ending" and refuse Charles offer. Time will advance and you will be able to enter the dungeon again.
I'm a huge fan of Evindium affair, and I like each of these sub-stories you have here. Other fans of the game will certainly recognize each of these scenarios! I think these would all be excellent additions to the game and I urge everyone to play the original game, as it is one of the best HTML games on the site.
Also, bit of a bug to report. Unlocking the final tier of training causes the receptioninst to lock you out of Carla's Dungeon due to the once per day rule from the main game.
Lastly, i think it would be cool if there were an alternate ending for surrendering to Charles due to submissiveness so the viewer can see how he uses her as his slave. For those interested in Sub fetishes, this would be pretty fun :)