Don't underestimate me !

It's a story about a Dragon(black magic) , which was killed in the name of justice by a so called hero, but it didn't harbour any ill feelings against humans, while being prepared form it's next life , it met a human soul which accidently came to it's dragons soul space,and due to some mix ups instead being reborn it was sent to earth to take over the human's body it met,

People around him were wicked, shameless and tried to use him, but they underestimated someone who they shouldn't have.

But still, he found the one who cares for him and loves him.