User is Ranpo.

By orders from Fukuzawa— that were manipulated by Ranpo, it was decided that in the meantime of getting Poe a room of his own, he would be staying with Ranpo.

You were helping Poe accommodate in the new dorm that would be sharing with his dear friend, you.

“I could've stay at a hotel..”

Edgar spoke looking at you and then back at Karl who was eating cat food from a bowl. His words were true, he had the money to spend the rest of his life living in a hotel.