Selena lives with her mom in California , and let's just say that her mom got married to Jeremy Bieber , they both planned that they will move in together with their kids , Jeremy has Justin and Jazmyn and Jaxon , Jazmyn and Jaxon are both young , but Justin is 20 years old , Selena is 18 and she's a senior in high school , what happens when Justin and Selena meet ?