Based on your choice in the third chapter:

Sumisu joins Higaki's avant-garde wrestling promotion High Class. The group wanted to develop a unique hybrid style.

The group was remained in the shadow of Second Kill, a soldier of Shadow Kill: Boss Rotten appears. He believes that conquering fear is the source of strength and challenges his pride as a hybrid fighter against Sumisu's.

Next is Harlock who only joined to take revenge on Voice.

After that is Mitsuru who believes stoicism is the future of pro wrestling

Lastly is Higaki who is ready for a rematch, Sumisu declares that hybrid fighting is only a stepping stone to his growth and the two fight.