Ai to Okane愛とお金 ; Love and Bread ; Love and Money ; amor y dinero (spanish)

From Pink Rose Scans: Jin's grandma wants one of her three grandsons to inherit her company. But the condition which the boys need to satisfy is -- earning 5 million yen!? While Jin is busy working for the impossible amount of money, a girl comes out of no where and asks him to marry her. What's more, the girl is in possession of 2 billion yen!!?