104 parts Complete Two boys.
One future.
Set in a world where a god's energy runs through, many of the populate creatures here use light and dark energy in their lives.
Two children from different worlds become friends, but only to be separated by the law.
Six years later, the yearly trials commence, where every sixteen year old kid from each world, Primula and Kaminari respectively, would compete for survival in their ever changing world. Now, it's their turn to participate in the trials. The two children seem to not know each other, and their odd change in personalities seems to differ, however, the one thing keeping them together is real and spiritual. As they realize how their world is more than just change and evolution along with remembering the past, they learn a lot more, and a fight or two may spark up a flame, or an everlasting war between two gods.
Timeline: https://www.chronoflotimeline.com/timeline/shared/21809/The-Two-of-Us/