A young man— Lein Arasaka. has woken up from his long coma, and found out that his sister has gone missing.

Unexpectedly, Lein found an app that he had created with his younger sister.

Instead of good things, something strange happened. His mother was shaking, and suddenly she pointed a knife at him!

Who would have thought that the app would take him to another world, a world where fictional imagination becomes a reality!

What is the connection between the another world, the app, his little sister, and his mother? Lein, become one of the hero tribe in a world full of fiction while uncovering the truth!