I, Who Used to Be an Idiot, Was Possessed by an Idol?!

Hyeon-Su has lived a solid life all on his own, doing all sorts of odd jobs without parents, relatives, or siblings. He didn’t even shy away from cleaning out latrines! Then one day, after narrowly escaping death, he opened his eyes to find... he’d been possessed by an idol?! Idol? Band member? The internet? At least 50 years have passed since Hyeon-Su’s time, and he’s completely lost in a world he doesn’t recognize. On top of that, the group is on the verge of disbanding...! Just as Hyeon-Su loses all hope of survival, Cha Su-Hyeon, the savior of the group “Technician,” appears before him. But this person... looks exactly like the young master Hyeon-Su used to serve...?!

(Source: Lezhin, translated)