PREVIEW
... have ever imagined that a vast underground world actually exists, about a kilometer deep into the surface of Earth.
Moreover, this underground world possesses a complete ecosystem, cultivating countless biological forms unseen in the surface world!
However, this dreamlike world may not necessarily possess a fairy-tale beauty!
It can also be filled with bloodshed and killing!
Da-da-da!
The sound of a miniature assault rifle echoed through the underground w ...
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