Jan is a teenager who’s spent his entire life with his nose buried in books.
Under strange circumstances, he ends up in another world— A hero with a mission to reach the 100th floor and save the world.

However, the world runs on a game system…
And Jan has never played a game in his life.
To make matters worse, he skipped the tutorial!

With death all too real and the world’s secrets still untouched by the heroes who came before him, will Jan break under the pressure—or is a hero with a book exactly what this world has been waiting for?