The Girl In Glasses

Nyla is the perfect example of a good girl.
River is the perfect example of a bad boy.
Nyla gets excellent grades, River almost never attends class.
Nyla has never had a drink or gone to an actual party in her life, whereas River goes to parties all the time (along with drinking).
When they unexpectedly cross, what's happens? Will Nyla still be the nerdy girl? Or will she be completely different, in good or bad ways?