Katherine Danziger
Eighteen years old Katherine is excited for the beginning of her college life. She meets a sweet guy Michael who eventually becomes her boyfriend. Katherine's mother has taught her that a girl's purity is so valuable, but Katherine ends up sleeping with Michael. She promises to Michael to love him forever but, gradually, Katherine realizes she doesn't love Michael and starts dating Theo.
Michael Wagner
Michael is attracted towards Katherine so much and wants to take their relationship to the next level. He thinks Katherine is the only one for her, but his heart gets broken when he spots Katherine and Theo together at the camp.
Erica Small
Erica is a childhood friend of Katherine. She likes Michael's friend Artie.
Artie Levin
Artie is a friend of both Michael and Katherine. He doesn't like Erica and wants to be just a friend.
Theo
Theo is a tennis instructor of Katherine. He's older than she is and very friendly with Katherine.