The World Below Us: The man arrived at the world underground

The army from the underworld had invaded our world. However, they had to combat the enemies with a civilization they hadn't expected.

Short story: The army from now presents suddenly appeared in the middle of London. David Magnot, the SAS special force, had to handle the situation and mission to explore and learn about the enemies.

Note: Some grammars are incorrect. I am not a native English language user. If you perceive any grammar/vocabulary/spelling errors, you are capable of reporting them in the chapter comment or suggest editing.

Respectfully yours,