The Phamton Priestess

there is a young lady named kuroko tetsumi who went to another world because of a book made by her father and now she can not return to her real world because it is a mission that needs to be completed and she needs to complete her seven defenders she will be with her mission and she was angry with his father because he preferred to leave and chooses him to dream of being an archaeologist ,writer , work abroad and his mother left them with heart disease or it's frustrating because she was born a girl not a boy .
when she got inside the mysterious book written by his father and he went to another world and she the emperor of razukan empire , '' cold -hearted emperor Akashi seijuro and he was of the seven of kiseki no sedai
what will he choose to love someone who gave him hope or his mission so that he can return to his real world.