Go into the closet

Deciding to see what was inside the hidden wardrobe, Micheal opens the mirror's hidden door.

The room was lined with what he thought were a bunch of human woman suits, before looking down, instead of normal human legs, every one of them was the suit of a monstergirl. Some were more monstrous than others, with odd skin colors, fur, or taking on the form of large objects. Their blank eyes staring at Micheal, turning him on exponentially, and making him want to wear every single one of them. Looking at the floor he sees what he believed are just props, until he lifts up a flower and a green woman falls out of it, startling him. Realizing that the "props" that were also suits his choices had been doubled, though, it seems that you need to enter the suits in odd ways...