The mc background is decent, very knowledgeable army engineer with photographic memory reincarnating in the medieval era germany. This covers a lot of things like the inventions the mc will introduce to this parallel eart. Then plot armors all over the place. Deaf and blind castle servants, non existent bodyguards and castle guards, very trusty peasants, superspeed inventing and creation of steel products, etc. It was hilarious reading his surprise when he was informed that his concubine was pregnant, what do you expect when you do it every night. Reading about mc so smart and brilliant almost every chapter then he does the stupidiest of things. Needs a lot of improvement in plot building and character development. It would have been nice reading more detail about how he teaches recipes, invention building, army buildup and territory development.