Mary having no interest in the vials of god knows what decides to sell the damned thing to a man named Marcus.
Marcus having paid top dollar for the mysterious device then decided on drinking one of the following anthromorphic fatfur vials below.
Weighty Wolfman
Hefty Hefty Hippopotamus Woman?
Big Handsome Bullman
Your own choice (No story limitation ideas as long as it stays a fatfur themed story.)
Characters who drink these fat anthromorphic transformation vials are considered as infectious as the vials that turned them into fat werecreatures.
This is a non limited story to write any CYOC story so let you imagination go wild.