Sumgyeojin Namja

All I wanted was to return the lighter! Taehun finally gets in contact with his old buddy, Wonu, and before they part after a few drinks, Wonu gets into a car accident after Taehun stops him to give his lighter back. After he wakes up from a coma, Wonu starts acting strange, like he’s a totally different person… Wait. So you’re Wonu, but not Wonu at the same time? Who are you?

(Source: WEBTOONS)

Note: The chapter count includes 2 epilogues.