Mukuchi na Koushaku Reijou to Reitetsu na Koutei: Zensei Hirotta Kodomo ga Koutei ni Natteimashita The Boy I Loved Became the Jaded Emperor

Synopsis

As a young boy, Prince Alexei was rescued from certain death by a strange woman with the appearance of a monster. The two of them spent blissful years in the forest , but tragedy struck after his former life caught up with him. Now a young man, Alexei has taken the throne, becoming a cold-hearted emperor intent with no interest in finding love. Little does he know, the person who saved him has been reborn as the daughter of a duke—a taciturn young lady named Eleonora. Soon enough, fate throws them together at the imperial court, but can Alexei overcome his jaded past to see what is right in front of him? (Source: Kodansha USA)