What happened to Juuzawa Juu at the end?
When the Three Musketeers arrived at the scene, standing in front of Shiraishi's dead body, Kirishima observed that


  Not many people believe in divine retribution. That's because God is a lazy fellow. However, he does a good job every once in a while.


Therefore, it was clear that the truck turned away from Juuzawa and crushed the nearby Shiraishi into a bloody pulp. Juuzawa was left intact (or not fatally wounded) after the accident.

The anime explicitly stated at the conclusion of the second episode that Ochibana knew Juuzawa was in danger only because of their bond from their previous lives.