A surgeon who can see lifespan of other people encounters a gangster who has no fear for death.

Jun Ha is a genius surgeon with highest success rate in his operations.
He has a special ability to see lifespan of a person he faces.
Sekwang, a ruthless gangster, mistakes Jun for a hit man and digs his past.
Strangely Jun can't see Sekwang's lifespan and becomes curious about him."

Original Webtoon

Official Translations:
R19:
•English: Pocket Comics, Manta
•Thai: WeComics, Boomtoon
R15: German
•English: Lezhin, Manta, Pocket Comics, Renta!
•S.Chinese: BiliBili, KuaiKan

Notes:
-All the english platform are using NETCOMICS' translation, as they are the one licensing the series.
-Pocket Comics, BiliBili Manhua and KuaiKan Manhua merged the main story and the side story into a R15 version. Only Pocket Comics then later released the R19 version.