After some searching.

Soon the two found a bathroom.

There is a sign at the door of the bathroom.

Restroom Rules and Regulations

1. Please be quiet when entering the bathroom

2. When entering the bathroom, please do not respond if you hear strange cries.

3. Do not look up when entering the toilet cubicle of the bathroom.

4......

"Strange Rules: I Can Analyze the Wrong Rules" Chapter 54 The Clue of the Note in the Toilet is being typed by hand, please wait a moment,

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