I Don’t Want To Be the Protagonist of a Romance Novel

I was reincarnated as the eldest son of a noble family with nothing to do. Even if I put aside the fact that the world I was reincarnated into is a little strange. – Northern Grand Duchess Eileen is confused after realizing she has regressed. – Admiral Lassiel realizes she has regressed and immediately turns the fleet around. – Princess Elena prepares to inspect the Weiss County, chewing over the past. What is this?