Ancient Kingdom in a Box

When a modern-day otaku discovers a mysterious terrarium that houses an entire ancient civilization, his mundane life transforms into an epic adventure. Inside this magical miniature world, kingdoms rise and fall, heroes emerge, and he becomes an unseen god watching over—and occasionally meddling with—the fate of an entire realm. What begins as casual observation soon spirals into something far greater as the boundaries between his world and theirs start to blur.