Kurokami Medaka decides, for reasons known only to herself, that she wants to conquer UA for the glory Hakoniwa Academy.
She sends a group of troops to conquer the area.
1) Hitoyoshi Zenkichi
2) Youka Naze
3) Itami Koga
4) Kei Munakata
5) Mukae Emukae
6) Oudo Miyakonoujo
They got dropped into present day UA with the desire to wreck up as many dudes as they can and to capture say... Todoroki and escape with him.
BONUS:
If they are unable to complete their mission, then Medaka herself will enter the fray.