Narukami was referring to Jim's past lives. Which was constantly full of suffering and hardships, turning him into the bad guy, and like usual, it was no exception in this life.
Narukami shook his head as he answered Jim's confusion, "nothing."
Jim paused for a short moment before he turned his head to the window and watched the scene as it blurred due to him inside a moving bus.
He did not say anything as his mind appeared to be wandering. It looked like the topic they talked about was a bit heavy to Jim and he was pondering about it.
Probably he pondered why he got separated by his family and why all of this happened, or maybe something else?
Either way, it has nothing to do with Narukami yet the latter would be lying if he was not worried.
"Sometimes, I wonder if saving her back is the best choice?" Jim pondered.