"I think it was the white one..." Ms. Tomlin said to herself before handing you the strange bottle. "Now drink up, but leave some for the rest of the class."
You took a quick swig of the potion. Forcing yourself to swallow the thick liquid, you began to stumble around. Your entire body began to feel itchy. You looked down at your hands, only to see golden fur sprouting from them. You suddenly fell to the floor as your entire body started to ache. "I see the changes are coming along!" Ms. Tomlin beamed. "Take notes, class!"
Your skeleton began to crack and shift as your body gains muscle mass. You noticed your fingers shrink into three digits as your nails sharpened into claws. The front of your hands became padded, turning into paws. As you stared on in slight terror and amazement, your spine began to elongate, until a long, feline tail burst a hole through your pants. Your feet began to change into a pair of back paws, mirroring your front ones. You slipped out of your shoes as the rest of your body became covered in fur. However, the most shocking change of all began with a burning sensation in your crotch. Soon, it felt like your manhood was shrinking, until you felt it completely invert and reshape into a fully functional womanhood. "This doesn't seem rrrowr...!" was all that was able to come out. Even Ms. Tomlin seemed confused.
Before you had a moment to react, your hips began to stretch out and widen to child-bearing proportions. Your arms and legs began to bulk up as they gained mass. Your nose shrank until it turned dark brown as your entire skull began to reshape. Your nose and mouth pushed out to form a muzzle while your teeth sharpened into fangs. Your ears moved to the top of your head as they rounded out and became covered in fur. Several rows of breasts formed on your chest as you felt your pupils widen. You wanted to scream, but all that came out was a loud roar. No longer an average high school boy, you were now a lioness.
"Oh, my mistake..." Ms. Tomlin spoke. "It was the BLACK potion for male lions. We all make mistakes every now and again, class." You growled under your breath as she spoke. "It certainly made for a more interesting lesson!" she beamed. "Now, would you kindly wait in the back of the class for the time being?" You reluctantly followed your orders and prowled to the back. You couldn't believe you were now a lion, let alone a female!