Okay, first the disclaimer; obviously I claim nothing but the idea of Alex finding two bulimic girls. The rest belongs to Anthony Burgess and Stanley Kubrick.
Clearly this is set slightly before any of the events of the book or movie, but not too long before. Also, this is sort of a cross between bookverse and movieverse. Basically, the costuming is movie and the rest is book.
Lastly, I would like to send out to anyone who themselves suffer any type of eating disorder, or knows someone struggling, my deepest sympathies. I hope this can be construed not as an attack or bias against EDs, but simply as the reflections of someone who has been there herself, and only wishes the best for fellow hosts of disorders. And I pray this isn't triggering, but use your own best judgment on that, please.