My Only One[3] (Korean: 하나뿐인 내편) is a South Korean television series starring Choi Soo-jong, Uee, Lee Jang-woo, Yoon Jin-yi, Jung Eun-woo, Na Hye-mi, and Park Sung-hoon.

His childhood friend had faithfully sent him pictures of Do-ran's development through the years so he knew what she looked like and how she was doing.

In the days that followed, he tried to find Do-ran and came to learn of his childhood friend's accident and death.

Her foster mother who made some bad judgements in investment and was in trouble with loan sharks later sought shelter with her.

On learning of the loan shark problem, Do-ran's father secretly helped them by asking for an advance on his chauffeur salary.

However, Do-ran's father was later cleared of the murder and he was able to resume a normal life; running a bakery and getting married.