My Only One

Madam Park Checks into a Sanatorium (1x42)

:

Eun Young confesses the relationship between Geum Byung and Dae Ryook after her plans of hiring a new caretaker fails. Geum Byung is appalled to find this out and decides to check herself into a sanatorium. After Soo Il fails to hold her back from her choice, he informs Jin Gook about the ordeal.