The main character is an operative of an illegal intelligence group, dying during a mission, falls into the body of one of the younger heirs of the landlord clan from another world. The heir is an ordinary aristo slacker, busy more with handmaidens and drinking than studying and magic. Only now his consciousness is dead, erased after the attempt. Rebirth? Yes I did. Now the implementation specialist has to play the role of a seventeen-year-old major who has taken up the mind.