I hit my head and forgot a lot of things.
When I woke up, I discovered that not only had I become eighteen again, I had also been married off to the ruler of a neighboring country.
As luck would have it, that ruler was the same useless prince who had once been sent to our court as a hostage, someone anyone in the palace could push around.
And as if that weren't enough, the two countries were at war. Now I was a captive offered up by the defeated nation.
Content warning: First person, fictional setting.
Theme: The Buddha speaks of eight forms of suffering. This world is itself a hell.