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Synopsis
Dong Woo is a kind, dependable, and upbeat young boy who senses something unusual every time he opens his closet door—feelings that only he can detect. Why does this happen? It turns out that Dong Woo is fated to become "the one who opens the Door." His closet serves as a secret portal linking the real world to a fourth-dimensional realm called "Uniland." Whenever he opens the door, waves from that alternate dimension enter his body.