Mystery, time travel, thriller wow you have it all. The plot is extremely well written. You have the psychopath and the time traveller plus the hacker. Really love all the author's work.
Shihyun Lee finds himself with only one to two months to live, but there's hope... for the right price. He has to kill someone, and not just anyone, he has to kill his doppelgänger.
Stop getting pissed you can't read bc the humongous watermark. Read here: https://forum.lolscans.com/index.php?/topic/475-reckoing-reader-and-download/
◥()◤ Advances in science, people expect to live up until 100 years old. Anyway, at some point everyone dies and Shihyun Lee has only a month or two left.. ══ "In these multiverse, in order for you to live, you have to kill the other you in parallel worlds then life force of your doppelganger will allow you to live instead." ══ His doppelganger happened to be a suspect of murderer case which’s so questionable until the workaholic detective Lee can’t let it go, wants to investigate it throughly.
≫➤ Seems like there're 2 doppelgangers of Lee in that world; a serial killer who travels from another world like Lee and the kind-natured guy who's an original people of that world.