In the land of Astraea, a man named Yuuki descends from the sky with no recollection except his own name. Kokkoro, an elf, appears and offers to guide him through this unfamiliar realm. Together, they delve into the intricacies of the world, from battling creatures to managing finances. Seeking funds, they undertake a simple quest from a local guild where they encounter Pecorine, a lovable yet voracious fighter, and later, Karyl, a magical feline. Friendship blossoms, leading the quartet to establish their own guild. Through their exploits, they traverse the lands, forge new connections, and delve into the enigma shrouding Yuuki's forgotten past.