The episode showed how Do Kyung and Ji An became closer as brother and sister. She tried to be his sister and tried to call him oppa. She also met her grandfather, the Chairman of Haesung. Surprisingly they bonded in a nice and not awkward way. There seems to be envy from the younger sister though. the warmth of the grandfather towards Ji An is a surprise from the family.
Ji An will work as a regular employee t the company until the time to reveal her as the daughter of Haesung group.
Will catch up on the episodes soon.