Still she was the key to unlocking his potential and the sessions were more than enjoyable for him. Therefore, he didn't reject her advances and strived to reach his own limits. Luna was an excellent partner for that since her hunger never diminished.
Subtle changes occurred in his physique after each session and being one of the involved parties, even Luna barely noticed the extent of these changes.
Zach's muscles grew stronger and more defined. Although he didn't gain any bulk like those wrestlers in the previous world, or those body builders who worked out for hours on a daily basis, his muscles became more prominent and his body more toned and chiseled like a piece of art with perfect bodily proportions.
His physical changes were not only limited to the appearance. His overall strength took a huge boost as he became more flexible and more agile than he had ever been before.
