당신, 거기 있어줄래요?

The name of this movie is 당신, 거기 있어줄래요? released in 2016-12-14 and it's main theme is Soo-hyun comes across magical pills that allow him to go back and forth in time. 30 years to the past, young Soo-hyun meets future Soo-hyun and learns that his girlfriend will soon die because of him. In order to save her, the two Soo-hyuns try to change the past together, but a completely new and unexpected past is formed that leads to a new future..