It was tempting to just run outside and become a truly wild animal for the first time... but Oliver felt much more comfortable experiencing his new freedom alongside everyone else. He sat down to watch it happen, taking a moment to get comfortable on the hard gravel. Within moments, the first scraps of fabric were already hitting the ground; mostly from kids that were already far along in their transformation. Hunter stood proudly with his hands at his hips, proudly showing off his furry chest and genetalia, one diminutive mouse girl undid her belt and the pants instantly dropped to her ankles, and the lioness simply shredded what she was wearing and roared triumphantly. Another boy with a horse head and hooves had to be helped out of his clothes by a friend, simply because he couldn't manipulate the buttons. Upon removing the pants, it was clear he inherited something else from a horse too.
Some of the more humanoid kids took longer to make their choice, but a lot of them disrobed anyway. Underneath the fabric, Oliver could see a wide variety of fur, scales, or feathers that were previously hidden away. One gloomy, black-clothed girl he thought was fully human, now revealed she was sporting the brightly-colored scales of a poison dart frog....no wonder she hesitated to take them off. The school teachers had to take her clothing away with tongs and later, they'd be burned.
In the meantime, the nude students-- not students, but wild animals, were celebrating their freedom in a way they never could before. Everyone was cheering and making animal noises, animals were giving each other group hugs (the gothy dart frog got nothing), and every one of them were exhibiting their animal behaviors with no shame. Except for two. In back of the area, there was a boy and girl pair of twins wearing... Oliver forgot what they were called, but they were the flashiest and frilliest clothes he had ever seen. They must have just started the treatment, and didn't have animal features yet. They looked horrified by everything that was happening. Who were these folks?