Parasite

After his rich friend asks him to fake qualifications and take his tutor role to a rich teenage girl so none will try to date her in his absence, the poor lead takes up the offer & enters the rich yet gullible family. He then cons his way into the family, dates his friend's crush & schemes to get all his family get a job under the family. When the owners leave the house on vacation they move in & undergo a bizarre encounter which changes the lives of everyone.