Dan-Han could not believe Eun-sun had him running after her. He shouldn't be doing this.
He was supposed to be angry, and he had every right to be, but deep down, he knew, and he has always known he couldn't blame her for anything.
If there was anyone he fully understood, it was her. She was a handful, he'll agree, most especially with that temper of hers, but she would never hurt him.
Though she tries to be strong and aloof with people, she is just one weak little girl who wants to do right by anyone who shows her the smallest amount of love. She might have messed up by not telling him about his mother, but she did right by his mother, and wasn't that the most important thing?