When William released himself from the Soft Skill pose, his entire skeleton crackled and popped.
Keeping up with Natalie's Soft Skill movements was not only due to the hell-style training and special body granted by Zede at an early stage, but also William's own subsequent self-refinement, the perfect body acquired during the 'Silver Circle' period, and the meticulous control over each muscle and softening of the bones through his 'Madness Brain'.
If it had been before the Open Source, he likely could have sustained an hour of Soft Skill practice before falling apart.
Over the course of the night, William gained a lot, and also understood why the Natalie sisters were capable of being the Chief Actors before, indeed it was no simple feat.
Starting from about the third hour, William entered a state of 'Unity of Body and Spirit',
