At the end of the warring states period, Oda Nobunaga is about to be killed by her retainer, Akechi Mitsuhide.  But as she falls to her death, she is somehow transported to the skies above modern day Japan.  As she falls to the ground at high speed, she faceplants a boy named Oota in the crotch!?
I know.
Ya lo sé...
Ya lo sé...
Eu sei.