Shows like Something About 1%

The story that begins when the female protagonist saved a very old but rich man. Then the old man named the woman as the sole beneficiary of all his wealth. His grandson on the other hand wanting to get the inheritance made a deal with his grandpa to date that woman but with a contract that comes with a price as well. How will each other endure their differences? Will they continue their love story or end it just how it is supposed to be?