After Traveling Through Time and Becoming a Vampire, the Sun Never Rose Again

"The sun set that day and never rose again..." "What day?" "The day I traveled through time and became a vampire." … Ivan traveled through time and became a vampire. But after he came to this world, the sun disappeared. The world has fallen into eternal darkness, wraiths are raging, and the undead are everywhere. The most unexpected thing is that the object of Ivan's time travel is actually the last vampire bloodline in the world and the great master of the blood dragon-Ivan von Devonmore. Until a few years later, the day when the Empire of Man once again elected a great emperor. "Wait, our Emperor is a vampire?"