Who is the real monster

Zane Destiny joined the monster hunter core at the age of eight after his parents were killed by one on their way home from a party. Eight years later he has become the captain of squad Divine and is the second ranked monster hunter in the world. Though with people talking behind his back he believes that he isn't worthy to be a monster hunter. Then when tragedy strikes again life plays even more cruel jokes on him and he realizes he may not be completely alone in this fight.