Hoyeong Lee leads a quiet, lonely life void of family and friends―so when he receives a warning about the end of the world in 15 days, he simply prepares as much as he can.

When the day finally comes, he finds himself teleported to a mysterious Tower alongside 23 others. Together, they are forced to participate in increasingly perilous missions for survival.

Thankfully, Hoyeong has something up his sleeve: he has access to a secret strategy guide that helps him successfully navigate each mission and gain his companions' trust. But not even the guide can help him figure out how to confront Seoyeon Son, a gun-wielding assassin who has chosen Hoyeong as her target for the Day of Blood.

When, where, and how will she try to kill him? With his life on the line, Hoyeong needs to find the answers on his own―and time is running out fast.

Original Novel:
Chapters, Volumes

Official Translations:
English