Songgongjihyangjok Guide

Everything Jae-Chan did was driven by his selfish one-sided obsession over his partner esper, Woo-Jin. It's only in his dying moments after a dangerous mission that he regrets getting in the way of Woo-Jin's happiness. So when he's sent six years into the past by an unexpected supernatural event, Jae-Chan decides to use his knowledge of the future and his guide powers to help Woo-Jin from behind the scenes. But the more Jae-Chan tries to distance himself from Woo-Jin, the less the esper will leave him alone! Can Jae-Chan truly give up on Woo-Jin and succeed at his selfless mission?

(Source: Tappytoon)