It's March and that means it is Saint Patrick's day time at Pleasure Island and the amusement park has changed to reflect that, the rides are replaced with Saint Patrick's Day style attractions, you see shamrocks, four leaf clovers, pots of gold, and rainbows, the staff are Leprecauns and all those other good stuff.
You didn't know about it while you were on the boat with the other boys and girls and you still don't know about it now, even though you are currently on the Island with all of the other boys and girls, but you are in danger of turning into a snake.
First you will grow a serpentine tail on your butt from your spine, then your legs disappear, then your arms, next you grow scales, your head turns that into a snake's and you grow fangs in your mouth.
After all of these happen, you will lose your Human Mind. If it progresses a little after that, then you will be stuck like this forever. And if progresses too much after that, then you will be unable to escape and you will collapse, faint, pass out, lose consciousness, be unconscious, and be kidnapped and be a prisoner of this island forever.
Also once you are seen turning into a snake, the Pleasure Island Staff, and guards will try to kidnap you, if they succeed, You will gradually, slowly, but surely turn into a snake and be a prisoner on this island forever.
If you escape the island and you get back to your home when you start changing you might turn fully back as a fully clothed human girl then again you might not. You might be a fully human girl, or a fully human girl but naked, or you might be a mostly human girl with just a Snake Tail on your butt just above your human girl anus, a scaly Human girl with a snake tail with no legs or arms, etc. Or you might even be a naked Female feral snake with your Private parts exposed, or even A Complete snake in both Body and Mind with your naked scaly snake Body, Face, tail, navel or Bellybutton or Belly Button, Vagina, Anus and Tail, Clothes-less, Naked, Nude and Exposed.