On the planet Hirans, the continent of Kashu is the only habitat for humans. Legend has it that on other continents there are mysterious and rare flowers, fruits and lands covered with gold, but thick fog acts like a barrier, blocking human exploration.

Thirty years of peace is about to be broken. In the secret experimental field, the Summoning Beast project is quietly underway, and the powerful force of the summoning beast. The shadow of war looms over this land. Can they find a way out in the desperate situation?

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In the misty Dragon's Valley, where magical beasts were supposed to roam, the ground was instead littered with corpses, resembling a hellish battlefield. The group led by Mels had finally entered the valley, but instead of discovering the rumored treasure, they unexpectedly found an unknown danger gradually closing in on them.