The main character, an operative of an illegal intelligence group, dies during a mission and ends up in the body of one of the younger heirs of a landlord’s clan from another world. The heir was an ordinary aristo slacker, more occupied with maids and drinking than with study and magic. Now the implementation specialist has to play the role of a seventeen-year-old major who has come to his senses in a difficult time of conspiracies, assassinations and palace coups.