Harry Potter And The Catgirls Of Gryfindor

REVISED FOR 2019! During the search for the person who opened the Chamber Of Secrets, Harry, Ron and Hermione made a gamble, and, in canon, Hermione almost lost her humanity. In this story, however, the magic bullet of magical medicine doesn't cure her, and instead changes her in ways that no-one can predict or control, causing a snowball effect that no-one could expect...