Dark Reincarnation : Dark Sight

A boy Named Ray age 18 thought that he got betrayed by the girl who was his girlfriend but it was not
the Bus crash and they both met God and Reincarnated in Another world
and our he became and son of aristocrat as Hiroki Aldenridge
and the the misunderstanding didn't solve and he gets an ancient power of a....what will be their fate wold they meet each other or he will still hate her
he will kill all the people of an organization due to a certain reason he changes at the age of 7
he has get allied with all the kings and defeat all 3 continents of demon kings

also and in the end will he become greatest, Assasin?
And At the end may make a harem


-this wn is written in simple words
And because name is based on ability the story in not dark