Shining Inheritance (2009)

Ko Eun Seong's life is similar to Cinderella's. After her father died, her stepmother, Baek Seong Hui, took away all of her assets and her younger brother, Eun U, suddenly disappears without a trace. Despite this, Eun Seong perseveres and works really hard to fulfil her dreams. When the CEO of a food company, Jang Suk Ja, suffers amnesia and can't remember who she is, Eun Seong takes her in. However, Eun Seong does not know that she is the grandmother of Seon U Hwan, the man who she switched bags with at the airport. How will their constant bickering lead them to realize that they care more about each other than they let on? (Source: MyDramaList)