Izarra Honda met him when she was six years old- her fiance Guren Ichinose.

They grew up together after their encounter with one another.

Now ten years later, problems after problems arise with the so call end of the world drawing near: with Mahiru betraying her family, the war between the Hiragi Clan and Hyakuya Sect, and the appearance of blood sucking creatures, vampires.

The powers which they honed over the years will be put to the test and they will have to become stronger to survive. 

[Know this is a terrible summary; I will come up with a better one. Never was good at writing them.]