--
When his chakra flowed and touched his bones for the first time, it felt overwhelming.
It was pain mixed with pleasure.
His bones certainly weren't prepared for a sudden influx of chakra. It yearned for the energy after taking its first sip, yes, but its bones were not yet ready to process so much. This is where the pain came from.
As for the pleasure, it came from the same source. His bones were cleansed of their impurities and nourished. The chakra infusion felt pleasurable, like a hidden weight suddenly disappeared from his shoulders.
His bones creaked and popped as they absorbed the influx of chakra. It felt comfortable and uncomfortable at the same time.
And this was happening while Ren continued cycling through his stances, by the way. He never stopped moving since, and he can't since chakra production demands it.
