Prologue:

You the reader, as a demi-human are raised by a demon queen after evil humans kill your family and everyone in your whole village except you. You learn magic from her, become SSS-ranked and hunt down the humans that killed whole entire village and you then return to your queen's side only to be fallen in love with by her after you serpass even her. What awaits you in your quest for ever lasting revenge? read on to find out ;)