isekai'd in to protagonist's world

The MC's is throwing in to world of a isekai'd protagonist's world. After reading a manga about the fantasy world and adventure. but with the MC's bad lucky her soul is transferred to the royal guard's captains young self. but bad things became of the captain in the manga due to the protagonist's finding and that reading her tragic l fate was ceased of the captain hatred. oh what can she do against the protagonist the princess of a nation.