Rein stayed in that half broken house of the destroyed human base for one day and his condition improved quite a bit. Now he was again able to move his body and walk properly. As soon as Rein got better, Ruby wanted him to return back to the city and rest but Rein was definitely not going to do that.
As he found out that this worm was making the monsters of the mountains to become more bloodthirsty toward the human race, this whole nation and many other nations surrounding it would fall into great trouble if all those monsters came down the mountain and started attacking the nearby human settlements.
So it was very important for Rein, Sophia and Ruby to take care of this problem first. Rein did his best to make Ruby understand that the well being of his health was not the top priority now and they needed to take care of this problem as soon as possible.
