Another World Opens: I Became a White-Haired Vampire Princess

A war broke out in the future. In order to gain global dominance, various countries began to research new weapons. However, an accident caused the dimensional wall to break, causing creatures from other dimensions to invade our universe, and the entire universe was enlarged five times. It affected not only us humans but also unknown existences. It also had a huge impact... And the story will start from the first year of the war...