This is based on your choice in Chapter 3 (Vision of "U") but there's another choice immediately that splits Chap 4 even further lol

Sumisu and Yamamoto join Sanada's U-Intel which has gone through some scandal with Yama blaming Minato and Andoh for this and the corruption and seemingly inevitable death of pro wrestling!

Here's your choice: Do you join Yama or go against him? Either way you have to fight against Sanada himself and leave U-Intel!