- ky ong ▁( s ister , ▁ 2 7 ) ▁Jun ▁So o - ye on ▁as ▁J ang ▁Se - ky ong ▁( s ister , ▁ 2 3 ) ▁Jo ▁Ky ung - h wan ▁as ▁J ang ▁H ak - so o ▁( father , ▁ 5 5 ) ▁Go ▁Do o - sh im ▁as ▁Na ▁Jung - ok ▁( H ak ▁So o ' s ▁wife , ▁ 5 2 ) ▁Na ▁Moon - he e ▁as ▁Ky ong - bin ' s ▁grand m other ▁( 7 5 ) ▁ ▁Kong ▁family ▁A hn ▁J ae - wo ok ▁as ▁Kong ▁Su - ch ul ▁( Ch an ▁Mi ' s ▁brother , ▁ 3 1 ) ▁B ae ▁Do ona ▁as ▁Kong ▁Chan - mi ▁( s ister , ▁ 2 2 ) ▁Park ▁Sun - you ng ▁as ▁Ha eng - ja ▁( Su - ch ul ' s ▁girl friend , ▁ 2 8 ) ▁ ▁Ext ended ▁cast ▁Kim ▁So - ye on ▁as ▁N oh ▁Se ung - ri ▁( K y ong - bin ' s ▁tw in ▁sister , ▁ 2 2 ) ▁J ang ▁Mi - he e ▁as ▁Han ▁Young - so ok ▁( Se ung - ri ' s ▁birth ▁mother ) ▁A hn ▁J ae - h wan ▁as ▁Kim ▁T ae - s ung ▁( Se ung ▁Ri ' s ▁boy friend , ▁ 2 3 ) ▁Park ▁Si - e un ▁as ▁K