Just dropping this off. Please note it will require you to log into their account to read: https://www.webtoons.com/en/thriller/a-killer-paradox/episode-1-prologue/viewer?title_no=5740&episode_no=1
New to Webtoons? How does reading work?
Basically for this series you have a certain amount of episodes that are free to read right away. After that you have to wait a certain amount of time before reading a new chapter. Every time you finish a chapter, it starts the timer for the next chapter. If you don't want to wait, you instead pay to read.