Well here are my theories on part 8......
1) Jobin Killed Kira
2) Josefumi knows something about the Rock humans
3) Soft & Wet will evolve the moment Josuke regains all of his memories
4) The unnamed man from josuke's memories played a part in the incident Six months ago along with Jobin, Josefumi, Kira, Karea and the rock humans.