Two Hearts Make The Crown (LeviHan)

*Attack on titan AU*
Royal AU where the scouts were considered the kingdom within the walls with Commander Erwin was the king but unfortunately his life was going to be cut short due to a terminal illness.
Hange his younger sister born to be the next in line if anything was to happen to the king was to be crowned as Queen and commander of the scouts army along with control with all who lived in the walls. But in doing so she is required to marry and produce an heir.
Levi , the prince of the akerman kingdom was to be expected to marry into another kingdom to bring back the Akerman reputation and was also to produce offspring . in order to make both kingdoms pleased both Hange and Levi were set to be in a arranged marriage