Duanmu Huai is involved in all three parts, but his main focus is on production and distribution. After all, as long as his company passes the distribution company's review, they can start filming. Every year, many independent producers submit their scripts to Duanmu Huai's company seeking collaboration.
The reason Duanmu Huai suddenly began to act out of character is due to his own motives.
From the information extracted from Professor Ueno, Duanmu Huai has developed an understanding of this world's Subspace.
Similar to Duanmu Huai's hypothesis, this world's Subspace is not closely tied to the soul, but rather seems to approach more of a mental influence, akin to adolescent syndrome.
So, one important question is... how does one enter that world?
According to Professor Ueno, most of the clearly marked locations in ghost stories can be used as entrances to Subspace.
