Sheltered Cassie is off to college and experiencing freedom for the first time ever. Her stepbrother, Xavian, has been enlisted to keep an eye on her. They're going to room together, after all, in a little apartment off-campus. Xavian's even booted out his old roommate, Joel, so Cassie will have her own room.
When Xavian discovers Cassie starting to spread her wings in a brief encounter with Joel, he goes off the rails in a jealous rage, forcing Joel out of the apartment to protect his innocent stepsister.
Xavian tells her she's not ready yet, but curious Cassie can't help it. Now she's like a dog with a bone - she wants to know everything she's been missing.
And she wants her stepbrother to be her teacher.