The beginning of everything was approximately ten years ago.
The encounter in the Kingdom of Gudenburg.
What happened there, after an interval of ten years, was a large-scale invasion of Savages.
That event would eventually be known as Second Attack.
During that time, Kisaragi Hayato and Emilia Hermit got wounded and separated from each other due to the attack of the Savages, but they reunited in the Maritime Academy-City Ship Little Garden at the age of 15.
Starting with the also first-years Fritz Grantz and Latia Saint-Émillion, they polished their skills as Slayers together with the comrades they met and after a number of battles, they improved their skills as Slayers and got more companions.
From there on, a lot――.
Really a lot of things happened.
The sudden duel with the Queen, Claire Harvey and his first sortie.
He even awakened the ability of the Variant.
He met Kirishima Sakura, the Diva, and encountered Krovahn, Nesat and Nakri in the Zwei Islands and participated in the large-scale operation《Operation: Bird in Cage》.
He used his vacations to return to Yamato.
And, at Little Garden School Festival『Gardens Festa』, the plan of terrorism done by Vitaly Tynyanov――.
In the middle of『Gardens Festa』, his little sister, Kisaragi Karen, was able to make her dream come true by borrowing the strength of Kirishima Sakura, the Diva.
That was a marvelous thing for Hayato.
After that, he went to the Kingdom of Gudenburg which was Emilia's hometown for the first time in a decade and later on, the Third Attack occurred.
Hayato headed towards the Empire of Yamato and played an active role, cooperating with local Slayers and his disciple.
Slayers from around the world became one to oppose the Savages, humanity was able to overcome the biggest invasion in history.
The result: the earthlings got in their hands a large sum of Variable Stones.
A festival of Slayers was held to distribute them.
――《World Martial Arts Tournament》.
Countries and organizations competed in it, and Team Little Garden, which included Hayato and Claire, advanced favorably and at the finals, it was decided they would have to compete against Puritaria, the most supported religious group in the world in which Serivia Notre Dame Paulo III was the Pope.
Although the conclusion didn't come because of the invasion of the Savages, it resulted in the victory of Little Garden due to the retirement declaration of the Holy Church.
Time flowed since then.
Hayato and the others went from first years to second years.
Finally, the stage to the moon while his dear kouhais were getting ready――.
They changed to Lunaltia Base.
There, Hayato and the others, about the alien who landed on Earth millions of years ago and woke up tens of thousands of years ago.
They got to know the secrets of Maria Florence aka Serivia Notre Dame Paulo III.
Serivia was an existence similar to God that gave intelligence to earthlings, watched them over and made them grow for the sake of returning to Planet Notre Dame the moment she had departed from there.
And so, Serivia, built up a time machine over the years, and in order to power it, she tried to steal not only the Variable Stones that were gathered at Lunaltia Base, but also the lives of the Slayers.
For her, the earthlings and the like were just raised for her own sake.
They were just ingredients for the gathering to achieve her desires.
Hayato and company clashed with Serivia to protect the earthlings.
They destroyed her dream in the battle; they defeated Serivia who rampaged; they were able to protect the Earth.
Hayato, who was caught in the explosion at that time, drifted in the universe and arrived on New Planet Notre Dame, a planet with intelligent life that had the same level of intelligence as the human beings――it was also the native place of Serivia.
Hayato and the earthlings sympathized with the inhabitants of New Planet Notre Dame, joined forces and headed to the final battle.
The enemy was an alien named Diff, he had built a manufacture factory of Savages.
The battle that was drawing near their very eyes was not only for the moon and the Earth.
And not just for New Planet Notre where similar intelligent life lived on.
It was a battle to protect peace in the whole universe.
They were able to come this far because they met the Hundred.
――《One Hundred Armaments》.
They weren't just anti-Savage decisive weapons.
The fate of the world was――.
No, they had become an existence for opening up each person's destiny.
The Slayers grasped them tightly in their fists.
They transformed each of their thoughts into forms.
And headed to the last battlefield.
– Hundred On.
Due to those words,
The possibilities of another new world were being opened now.