The boy who becomes a half-demon

The boy was an good kid with loving family but one day evil man killed his dad and mother leave his sister and the little boy the boy was in rage eyes full with fire but his big sister said please stop the boy stop but was crying that his sister start singing say the day is dark but tomorrow is an shining day our sister is here and the boy stop crying but 10 year later the demons in hell said 1 2 3 and he turn 18 and his sister was happy because today she was turn 20 years old that means she can go to see his brother but in the way the same man who killed his parent kill his sister the boy rage turn into demon but half one but his sister song keep his heart with little of red and the blue eyes turn into red move with the speed of light he saw the man who took everything from his mother father now his sister and now he just killed the man with an tear say I hate you but then the demon said now and all of the demons in hell attack the boy the boy was strong but the demon when too much for him so he drop down and the last thing he saw was an demon girls said why now and the girl knock out him out than 2 days later he saw the demon girl. 

The demon girl was angry because he was the child of the demon king but the demon killed died so she was happy to be the first-ever demon queen but he turned 18 the day his power grew but no the demon king had to die today so the girl was always rude to the boy who now was the next demon king but the demon girl did not care so every day was a day to kill the boy but every day the boy power grow with rage knew his sister blood was dropping down into the man who kills his parents 2 years later he knew 20 the age of death he was too strong now he so the demon king he hates every human live so with his power he said human know is the day I kill every human live my name is Transter the 5 demon king set war with humans. 

The war lasted 100 years the humans were good they learned all the art of the demons but it changed when the demon king attacked himself and killed all of the humans the demon girl said you lost Transfer said how and the demon girl said first the is more than one or thousand of plant with humans two humans are the most debt plant on the mike way it the human-made friend with 1/3 of the universe and all of them hate demon so now I died you die the whole race of the demon are died Transfer said let go to the near plant and see it they will help and they want to the plant but it was not the plant Slay it was one of the plants that hate demon and loved humans and the plant was a full of master swordsman the sword can