Summary: Erin and Aaron's first day as step siblings and they are in no mood to get along. But when they discover that their differences may lead to a family break-up, they must find a way to come together.

Summary: Aaron finds the perfect replacement for his beloved broken piano but the shop owner, Mr. Ledder, has a history with Erin and refuses to sell the piano to an instrument killer like her.

Summary: Aaron sets out to find a girlfriend to break his heart so he can write a hit song, that girlfriend turns out to be Erin's BFF, Vivian; Erin tries tricking Vivian into breaking up with Aaron but ends up betraying her trust.

Summary: Erin and Aaron clash over Saturday night traditions: Erin wants pizza and Aaron wants sushi; Chuck and Natasha have a special daddy-daughter day planned but struggle to find a shared activity they'll both enjoy.

Summary: While Chuck and Sylvia take a vacation, Erin and Aaron convince their parents to let them babysit Natasha, not realizing how much trouble she will be.

Summary: Erin and Aaron are excited to compete in the music competition between band and chorus with the winning team getting a trip to New York City; Erin's laid-back ways causes Aaron to kick her out of band, driving her to battle it out by joining chorus.

Summary: Erin and Aaron decide to have a sing-off to see which one of them gets to keep their first name; when Aaron loses, Erin pushes him to adopt a new country persona to match his middle name.

Summary: Erin invites Aaron's old friends and teammates, the Yellow Jackets, to visit him, not realizing Aaron never told them about his love for music; when Aaron lies to his friends, Erin has to convince him to come clean.

Summary: After Aaron urges Erin to bond with Sylvia, Erin and Sylvia start spending lots of time together making Aaron and Chuck feel left out; Natasha tries to gain power at her school by having Vivian and Hunter impersonate Erin and Aaron.

Summary: When Natasha plans an elaborate photoshoot for the family's moving announcement, Erin and Aaron fear the pictures will be a social disaster; Sylvia and Chuck lose Captain Cutie Pie and go to great lengths to win her back.

Summary: While Erin struggles to get a date with her crush, Cayden, Aaron has money trouble for a date with his crush, Lily, at an expensive restaurant; Erin and Aaron decide to be in cahoots and come up with the ultimate plan to land them their dates.

Summary: When Erin and Aaron upload their songs online to choose which one to perform together at Asbury Park's "Porchfest", a Grammy-winning producer reaches out with a life-changing offer for one of them.