Anna, a dimension traveler, enters the ominously nicknamed “Swan’s Grave”—the Loengrin Marquisate—as a maid, in hopes of finding a way back to her original world.
There, she encounters Marquis Rothbart, who mistakes her for his long-lost wife and forcefully claims her. Soon after, he makes a shocking proposal: “Become my wife’s replacement.” He also reveals the only way for…