The power of darkness : Revenge

A man used to be a pawn was sent to another world with a system as a gift from a goddess. He began to live a looner life but one day he began to find something that he wanted to protect at any cost but thing don't always go tge way we want so he lost it. Then he began to take revenge on all those who took away his happiness. This is the story of the one who rised himself to become the lord of darkness.