章 116: Can see through you

"This is operation: catch the culprit!"

Nina paced back and forth in her room while biting the tip of her thumb. Earlier today, she saw Penny and those other two take the longer route. Since Nina was trying to hide the fact she was going home to a different household, she thought their route would lead her somewhere else. 

But instead of finding out a different exit, Nina found out something else.

"They have that kind of code?" she spat out nervously. "How come they didn't tell us this when we registered?"

Nina already thought after throwing away the keychain, nothing would tie her up with what happened. But now, Penny still had the other part of the keychain and, to make it worse, the piece she had had the serial number. 

"Oh, no." Nina quickly pulled out her phone and checked the online registration.