Great art. Cute, sexy and big, but not too big just yet.
So... I understand that perhaps lore-wise all types of mana are stored in breasts, and that making more extra art would take quite a lot of extra effort and the topics I might suggest will be more niche... But would be cool if Green Mana increased the Witch's butt size and Red Mana - muscles (cause power hehe. or maybe just both breasts and butt)... But that's just my wishful thinking...
Nonetheless, breathlessly awaiting the next updates and new sizes!