This is based on your choice in Chapter 3 (Vision of "U")

Sumisu joins the Kajiwara Gumi which is lead by Joe Kajiwara. The group doesn't have enough members and so accepted a deal with View Japan.

You first fight Date as he insults Joe and Sumisu sticks up for his boss, Date also 'reduces' wrestling to a science which Sumisu disagrees with and believes is part of the downfall of pro wrestling. Sumisu argues that one should find the answer inside the ring.

Then is Kouno who fights you for no real reason really...

Lastly is the boss himself: Joe Kajiwara.

Sumisu swears that he is going to finally surpass him.

Really lastly is Victory Musashi! Joe's master, the master's master! Sumisu is told to challenge the question of pro wrestling as Musashi says that even he doesn't know why he enters the ring but that he is waiting for someone to shake up the now stagnant world of wrestling.