Sekai is the story of a young man named Hartea IDka who wants to abandon his normal everyday life to seek out a grand life in adventures within the beautiful and utterly horrifying world he lives in.

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This is a story that is a multiversal story, with separate series with the title "Sekai" within the name. Each verse in this Sekai realm are stories that completely change Hartea's character and the world and setting the Sekai in which is this one originally was in. The entire Sekai series is based on elements of American comics, mythology from all over the world, famous historical writings such as Journey To The West, The Odyssey, Dante's Inferno, and many many more to all come together to bring out a grand adventure.