Intro[]
Turns out an otome game isekai might be Tier 1...
Tree[]
There is an infinite number of parallel worlds:
Volume 3 Chapter 1
Turns out it's actually "countless" instead of "infinite", as the raws use 無数 (Musu) instead of 無限 (Mugen)
この世界以外の世界、つまり並行世界が無数に存在するんだ (There are countless parallel worlds that exist outside this world)
The structure that holds those worlds is equated to a Tree, where each of its countless branches are a world of its own:
Volume 3 Chapter 1
A single world/branch of a tree is implied to be a universe:
Volume 3 Chapter 5
The caretakers of the Tree are gods that hold influence over all of the Tree's worlds:
Volume 3 Chapter 1
Forest[]
It's implied there are numerous trees, comprising a "forest". The other trees are called Otherworlds, and they each have their own god that influences its worlds/branches:
Volume 3 Chapter 5
Higher Worlds[]
Kugelschreiber (a caretaker of a Tree) states that there might be a bigger Tree in which a single of its branches would be a whole Tree by itself:
Volume 3 Chapter 5
Yumiella reinforces his point by stating that the world she is in is a reflection of an otome game. So for her, a higher being actually existing wouldn't be far-fetched:
Volume 3 Chapter 5
The difference between the lower world to the higher world is equated to a fictional story. And Yumiella states that the hierarchy might as well be endless:
Volume 3 Chapter 5
Once Kugelschreiber was asked about the validity of said hierarchy, he stated that its existence is theoretically true. And after witnessing the power of Keep Living Sword, he affirms the existence of a higher world:
Volume 3 Chapter 5
Conclusion[]
- Tree: 2-B
- Forest: 2-B
- Higher Worlds: Varies from Low 1-C to High 1-B