I Decided to Wait for You - S1.E25

Tae Hee breaks up with Si Hyun and moves out of his building. Si Hyun wants to grab onto her, but since he knows that he has always been the one to hurt her, he decides to wait. Everywhere he goes, he is reminded of her. Meanwhile, Si Hyun tells his grandmother that he is not Seok Woo's biological son, and she tells him not to mention it to anyone until she says so.