What kind of originality? Idea?
If so, no, our story is not original and will never be.
None of our ideas are unique to ourselves, it is not a reach that someone out of 7 billions and counting human in this earth has a similar idea.
Probably those ideas have been present in the mind of your dead ancestors too.
That does not matter.
Because we as humanity can move forward by developing ideas from the preexisting ones, copying from what we observe, and be inspired.
If that means the story in general as it is, maybe yes.
I only think in this context originality is defined by making it by yourself, not blatantly copying and modifying other people's creation, recreating a work, making a series as a derivative or extension of other people's work (a.k.a fan-work), or not obeying conventional storytelling tools like common trope or cliché (this one is a bit difficult).
In a narrow context, my series is original because I make it myself without it being a recreation/copy/derivative of existing work. In a wider context, the idea is far from original.