It was a normal day in the mansion. Y/N was cleaning the tables for future guests who might come. None of the other humans payed attention mostly cause they all didn't care about drones or something.

They finally finished. Now they had a short break. Y/N headed over to the library, looking at all the books on the bookshelves. Nothing interesting. With a sigh they turned around. Face to face with a strange centipede creature grinning at them. Wait. Cyn? Doesn't matter since they were powered off anyway.

. . .

Y/N woke up in the basement where Cyn was always locked in restrained to a chair. Staring right at them was the small figure of Cyn, their little sister. Smiling innocently, she has one hand on her head keeping it up while she held a hammer in her other hand.

“Morning big (sister/brother)! Giggle, we're going to have great fun together.”

She didn't tell her the true intentions, she was going to smash through their visor to mess with their memories and reset them.