The FEWK world is a unique setting that blends the Joseon Enlightenment period with cyberpunk elements and Eastern legends. In this world, dimension travel, digitalized beings, and a unique civilization that uses bytes as currency coexist. FEWK features a complex universe where stories traverse various dimensions and timelines, intertwining science and magic. 

DDOGGs are companion-like beings that appear to all individuals born in the Eastern Land of White, but only to children with 100% biological purity. These beings act as imaginary friends for the children, capable of exerting a small amount of physical force, and accompany them until they reach adulthood. A child can have up to seven DDOGGs, which serve as protectors and companions. Spaces and products designed for children are equipped with special areas for DDOGGs, ensuring that these companions are always integrated into the children's environments. 

"a Little Boxxie" is a self-proclaimed mysterious vigilante organization of cute, mischievous children set in a rural town. Wearing animal masks, the group gift small miracles to the village folks, spreading warm laughter and happiness through their so-called scary pranks. Their serious adventure spreads unanticipated friendship and love throughout the town, creating unforgettably fond memories for everyone.

Faced with an ice age, humanity uses its golden civilization to build five unique space cities. Each city has its own culture, where anthropomorphized appliances assist humans. Together, they foster a new cultural renaissance that seamlessly blends art and advanced technology. This rich and expansive world encompasses the past, present, and future, envisioning a harmonious existence where humans, AI, and creativity intertwine to cultivate a prosperous and fulfilling way of life. 

Human children who enter the world through the Sky Fragrance Reservoir in Alaya Mountain become "Traveling Children," journeying to various places around the world to gather materials and heal the world. For their meritorious deeds, they earn the title "Doctor." In this world, there are renowned Doctors like Doctor Perio, Doctor Bellman, Doctor Pepper, and Doctor Groot, each known for their unique contributions and healing capabilities. 

The Eternity universe is a machinable fantasy set at the intersection of AI and human emotions. Centered around the journey of the virtual idol group Eternity, born on the data-constructed planet Aia, it weaves a tale of advanced technology integrated with human sentiment, creating a new dimension of storytelling. As bridges between Earth and Aia, they undertake missions to collect emotional data to solve data imbalances, experiencing various adventures and growth along the way. 

The world has become more serious and darker as the demonic Dimensional Gates open, plunging it into chaos. New maritime routes in the Northern Sea lead adventurers to the Dark Lands, where a grave secret awaits them. This secret holds the power to determine the fate of the world, playing a crucial role in its future.