Legally Husband

A university student who failed in her first love and is broken after break up needed a house to live ended up getting into a contract relationship with the heir of a food industry who needed to get married to the girl whom his grandfather chooses for getting the company.Will they fall in love with each other if so then how?!!!!
And what is the reason for his grandfather to choose the female lead as she was not any profitable for the business matters.
Will they have a change in their heart?