(Author's note : That idea of mine has been improved upon by Burst Jammer who made an alternate version of my chapter. Other than enhancing the transformations' descriptions, he has also modified the rule I had made that the duration of the transformation shall be left to the appreciation of the teachers or parents, for a duration of three weeks. Though his version of the story had a wider success than mine, I would like to have an equivalent for this version of the rule and as such, I'll be pasting the chapters he made for his version here.
Thus the merit for those chapters, should they be read is not mine to take.)
Edwin watched his skin undergo a change, as it became darker as well as taking on a tougher texture, the Latino boy getting an Inkling as to the animal that he was currently becoming. Ms. Santos could only give him a somewhat reassuring smile as his changes progressed, the next of which commenced on his feet.
His feet began to clench, balling up as the skin hardened and blackened, Edwin losing any feeling in them as they shifted into hooves, causing him to have trouble supporting his body weight. His hands soon quickly followed, however, balling up and hardening as his feet had done, causing the boy to fall onto all fours.
The skin on his arms and legs underwent similar changes, admittedly not as hard as his new hooves, and became stiffer, a light coating of black fur covering them. Edwin's body began to gain a ton of weight as all, his stance having to shift as his body shape became more and more like that of a farm animal.
"Ms. Saaaaaaaa-" Edwin began to say, attempting to ask what animal he got, before an ovine bleating sound burst out from his mouth as his nose and mouth began to push forward into a snout, his head covering itself in the light black fur as it shrank. However, as his head shrank, his ears grew longer, stretching out on each side of his head.
A soft cotton like substance began to grow from Edwin's skin, a substance easily confirming Edwin's suspicions that he was being turned into a sheep. But, as he quickly realized when he began to grow a row of nipples under his belly, his species wouldn't be the only thing that changed.
His dick began to harden as it tingled like the rest of his body. His testicles were first, being slurped inside his new body, being converted into fitting organs. Next was his penis, already stiff as it began to enter his, now her body.
Feeling immense pleasure from this, Edwin couldn't stop a bleat from forcing itself from her mouth as her penis inverted, becoming a now female sheep's vagina. Her changes finished, Edwin was now guided by the farmers to the rest of the students that were turned into sheep, her mind wondering what would happen next.