12 Years Promise[1] (Korean: 달래 된, 장국: 12년만의 재회; RR: Dallae Doen, Jangguk: 12nyeonmanui Jaehoe; lit.

It aired on JTBC from March 22 to June 29, 2014, on Saturdays and Sundays at 20:45 (KST) for 26 episodes.

[2] The native title is a pun, and can also mean Jang Guk Becomes Dal-rae: Reunion in 12 Years.

In 2002, on the night of Korea's momentous World Cup win, high school sweethearts Jang Guk (Lee So-yeon) and Yu Jun-su (Namkoong Min) sleep together and Jang Guk ends up pregnant.

They are given permission to marry by Jun-su's father, but after a horrible accident, Jang Guk loses the baby.