Concealing Technology

Exploration Stage: Wonderful Cat Cafe
From: Valerie
Description: I assumed the funnel was made by Miyuki, but there were no dangerous artifacts in the cat cafe. Wait a minute...I think I hear a meow coming from behind the wall where I didn't hear it!
Completed: How did you notice that there is a hidden door hidden behind this board? I knew that old-fashioned stores had hidden passages for employees, but I had no idea about this door. I can hear the cat meowing from behind the door. Maybe the cat has found Miyuki and is asking for help.