Yuukyuu no Campanella | 悠久のカンパネラ

The Kingdom of Atlasia A kingdom located on the floating continent of Atlasia, a floating archipelago located in the northern part of this world. Not only in the Kingdom of Atlasia, but also in the entire Floating Archipelago, there was a legendary clan that was passed down from generation to generation.

The legendary heroic clan "Oasis". They had saved this land a hundred years ago. But the clan's sub-leader, Chester Silver, had gone into a long sleep.

One hundred years have passed since then. Chester woke up from his long sleep and has begun to push for the idol princess Clelia, who sings for the people.

And now... Princess Clelia, who had been longing for the adventures of the heroic Clan Oasis, has come to the rescue. Chester Silver and the twin sisters, Angelique and Juliet, who were once members of the clan, come together and start a new adventure. A new adventure begins to unfold.

Just then, Colette, a mysterious girl sleeping in the depths of the ruins, tells them. "When Colette wakes up, the world will be destroyed."

In a world that has begun to undergo changes, causes and effects that transcend 100 years of time intersect. The adventures of Chester and his friends accelerate.