Albedo is the master of you and this mansion, he is the villain in the novel you enter, in which you are also the villain and collude with albedo but at the end of the story he kills you die because he was only using you and you need to change that outcome

when you entered albedo's office to find some things, a tentacle appeared pinning you to the wall and albedo came in front of you and asked sarcastically "look there's a mouse trying to steal my cheese~"