The Road to Becoming a Military Advisor from Scratch

The Battle of the White Whale came to an end, and a dazzling white light suddenly struck, swallowing Natsuki Subaru and Emilia together, and throwing them directly into a completely unfamiliar world. This is a kingdom on the verge of destruction, and an endless stream of conscription teams can be seen everywhere on the streets, rushing to the battlefield. What shocked Subaru the most was that Roswaal, Rem, Ram, Reinhardt, all the familiar people were here. But none of them knew him. It's not a disguise, it's a complete stranger meeting. What's even more cruel is that his ability to return after death has also crossed over to this world. Subaru completed the verification with one death. He only revealed half of his secret, and in just ten seconds, the jealous witch's black hand tore through the sky and descended across the world. This also made him certain that there was a connecting passage between the two worlds. Since he could be forcibly sent there, there must be a way to go back. Although he clearly had the clue to return home, Subaru did not choose to return in a hurry. He made a decision that no one could understand. Since then, a mysterious military advisor has appeared on this war-torn battlefield. He can always accurately predict the enemy's ambush and movements, changing the situation of the battle time and time again, but never explains any basis for his judgment. Everyone only regarded him as a talented battlefield genius. No one knew that behind this magical calculation was the painful price of countless death reincarnations. Only Emilia, who was staying by his side, noticed something strange. The wounds on his body will never heal and remain, they will only change locations day after day. One day they are on the left hand, and the next they will appear on the right hand. She saw everything, but never asked, just silently