Albert, who was reincarnated in another world, was aiming for a peaceful life in the Kingdom of Alexa. However, a certain problem occurred and his future was destroyed. Therefore, he plans to take in Marida, the blood demon who is said to be the strongest in the empire, who is aiming to return to the nobility, although he has been expelled from the Elancia Empire. Somehow, he managed to win over Marida, but Marida took a liking to him and ended up becoming her son-in-law!? Great achievements in the military, etc. Naughty harem comedy Senki opens!