The underworld, the legendary place where demons, fallen angels and ghosts live. Inside a splendid castle.
"Ha...ha..."
A teenager is trying to swing a sword in the yard.
"Nine thousand nine hundred and ninety-seven... nine thousand nine hundred and ninety-eight... nine thousand nine hundred and ninety-nine... ten thousand!"
"Huh...huh..."
The young man got down the long sword in his hand, wiped the sweat from his forehead and gasped.
The sixteen-year-old boy had short silver-white hair and bright black pupils.
Although the handsome and handsome face is still a little immature, there is a trace of perseverance and calmness on his body that does not belong to this age.
"Xin can't be lazy! Today, he has to swing his sword 100,000 times!"
A cold and serious voice sounded behind him.
"Understood, sister!"
Xin nodded helplessly.
"Really, every time I practice, I'm so serious, it's not cute at all."
Xin muttered a few words and continued to swing his sword.
Xin is a traverser, and it is impossible to know how to traverse. His current name is 'Xin Lucifuge'.
At first he came to this world, he was still a little skeptical.
But a few years after he came into this world, Xin was fully confirmed.
The world that brought him back to life was the world of High School DxD.
Demons, Fallen Angels, Spirit, Angels...even Dragons and Gods.
These existences that should have existed in fantasy are all real in this world.
And the person who spoke just now was his sister, named Grayfia Lucifuge
It is the family member of the Demon King Lucifer in the original book, known as the strongest queen among all the family members of the underworld, nicknamed the silver-haired queen of annihilation.
But now she is no longer the Gueen of Demon Lord Lucifer.
Grayfia was born outside the preface, the famous Lucifuge family in the demon family, the family has been the confidant of the old demon king Lucifer for generations.
During the reformation of the demons, she fought against the reformers as a member of the old Demon Lord faction, and finally competed with the Demon Lord Serafall for the seat of the strongest female demon.
Although the competition failed, its strength is already the first level of the Demon King.
This also made the Lucifuge family a powerful demon family in the underworld and broke away from the Lucifuge family.
However, due to the fact that the entire Lucifuge family was at war with the Reformers, there were only two people left.
And Xin is the last male of the Lucifuge family.
Originally, Xin thought that he was born into a famous demon family and had such a powerful sister.
Then he must be able to have a strong strength, hang down the major demon kings, and take all the girls he likes as dependents.
In this regard, Riser Phoenix can be said to be a role model for all demons.
However, the ideal is beautiful, but the reality is cruel.
As the last heir of the Lucifuge family, Xin does not have a strong talent for cultivation.
Although he has worked hard to cultivate for more than ten years, now he is only the strength of a lower-level demon.
Look at Rias and Sona, who are the same age, they have already reached the strength of high-level demons.
This kind of talent even he wanted to give up training, but his sister Grayfia did not give up on him.
He still stared at him sternly every day to finish his training.
And it is precisely because of this that the name of Xin's waste material spread in the underworld.
But he didn't care either.