Prologue

The night of slaughter and internal darkness, a blood demon can be seen with silver hair and bat like wings.

The scene of a little boy cry and mourning for the deaths of his parents.

"I'll kill you! You monster! Why them? Why us?"the boy shouted to the blood demon.

The blood demon just smiled to the little boy and then said "You can try killing me but I can kill now, right? But where's the fun in that? Let us seen in the far future if our roads will meet again." as she disappeared in her shadow.

"I'll kill you so better watch your back!" The little boy shouted at the disappearance of the shadow.

"Watch your back!"