Yep, I agree...very heart-wrenching. The most heart-wrenching line was at the end when Tan Tan told Young Do, "You can have her." It's like he has given up hope completely.
However, I think through how he is breaking down, he will slowly redevelop the relationship with his parents and brother. Won is taking the initiative now to act like an older brother, and Young Do is slowly becoming good friends with him.
Finally, Shin Hye is dolled up! I wonder what scene that is! Hopefully, not the ending scene!