Sorry, but what you describe it's still impossible and it's not fractional reserve.

Fractional reserve banking is a system in which only a fraction of bank deposits are required to be available for withdrawal. Banks only need to keep a specific amount of cash on hand and can create loans from the money you deposit. Fractional reserves work to expand the economy by freeing capital for lending. Today, most economies' financial systems use fractional reserve banking.

When a bank lends you money for buying a house that money is directly spent as it leaves the bank to the previous owner, you can't do fractional reserves when you're paying money, you can only do that with reserves, that's why they are called so and not fractional loans.