FrUStRAtE NIZZ

So in this story due to sudden monster invasion the usual clich happen and all the government officials die and only 2 council officials are left and this story is basically about the ml who is a congress men later became the president as all other politisians dies and controles and asserts the situation idk anything else and my explanation is very bad so please tell me the name if u remember something like this

Does anyone know similar ones like training of a novice master pleaseeee telll!