A and B entered into a joint venture contract whereby B agreed to put up a restaurant on the lot of A. N, A's neighbor who owned a lot across A's lot, learned of the transaction between A and B. Anticipating that many customers would patronize the restaurant, N decided to improve his vacant lot for parking. He incurred P20,000 for a guardhouse and other improvements which he had not yet paid to his contractor. Later, however, A and B mutually cancelled their earlier contract and entered into a new one whereby B agreed to put up the restaurant on another lot belonging to A which was located about 100 meters from the original area. N learned of the cancellation of the contract and decided that he would sue A and B for damages he allegedly sustained by reason thereof. Decide.