Taikoku Cheat nara Isekai Seifuku mo Rakushou desu yo?

I traveled to another world and was told to be an "Emperor". The perk is a lot of wives!? I was summoned to another world. What is this!? I'm supposed to be the Emperor's body double!! The bonus is that I will have many cute wives... But first, I have to win the war. An unparalleled other world fantasy!!