"My Loving Wife is Actually a Demon Spy"

A man from our world, who never knew family or love, is reborn as a despised and worthless noble. He finds profound happiness in an arranged marriage to a kind, average-looking woman, only to discover she is a terrifyingly powerful vampire general in disguise, sent to spy on the human kingdoms and who holds no love for him. His journey to win her genuine heart, while hiding his own origins and navigating a corrupt nobility, will unexpectedly position him as the key figure in a conflict that could shatter the world.