After you open the valve system Reny records a message with Mr. Bunny. She just needs to get Mr. Bunny outside.
This is the low-spoiler guide for "Getting Mr. Bunny outside" puzzle in Kapia. Unlike in normal walkthrough, you get gradual hints on how to solve the puzzle. Click the big button below to see your first hint. If the hint contains a spoiler, you will be warned about it before clicking.