Geek hypnotized into slut bimbo

Misty, a normally straight A student, is having a hard time in class. Her friend recommends she start a video diary to help talk out her feelings. She also gives Misty a sparkly friendship necklace and tells her not to take it off. Misty is thankful for the help and gift and wears it even though it isn't her normal style. What she doesn't know is that this necklace is magic...her friend wants Misty to be a bimbo slut like her so they can be dirty girls together.