Lmao, and immediately these girls fuck themselves over. So goddamn naive... or maybe they realized and purposefully still agreed?
"Only I can cook" means that they basically can only eat what she prepares, or they're disqualified. So... what if she poisons their food?
"No one can leave their rooms at midnight" means that they'll get disqualified if they try to leave if something eventful happens... like, say - the house getting set on fire. Or a "random" outsider forcing their way into their room...
Even if you didn't know there were criminals in the group, those first two rules are incredibly sus if you look at it from a logical way lmao