I am The One and Only Serena Choi!

Lives with both grandparents who are filthy rich as they own the biggest companies in Korea. Both parents have died from a fire accident with her inside the house, sole survivor, has a slight trauma because of it. Of course with her parents already dead, Serena is the only Heiress to her grandparents company.

Is still very cheerful and kind despite her traumatic past and that's why everyone loves her. Only a select few know her past and that includes Mi-rae and Hyun-jung who are both her best friend.