1 Percent of Anything
From DramaWiki
The story starts when a school teacher helps an old man on the subway. He is not just any old man but the CEO of a major corporation. He decides to place her into his will, but there is a very large condition attached to it. She has to marry his Grandson, who is currently running his hotel. The Grandson has a temper and does not agree with his Grandfather's plan for him, but he doesn't want to lose the company to his cousin.