Crimson Moon may refer to:
- Crimson Moon, a rebel against the Royal Family of Ga Guk who wears a crimson mask
- Crimson Moon (Song), a song entitled and dedicated to the Crimson Moon which was forbidden by the Royal Family to be sung
- Hong Wol (often shortened to Hong), the Korean translation of the Crimson Moon and an alias used by Yi Hwi, usually as a painter
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