We've got all the ingredients (Except you needing me.)

After Will moved to California, He was able to make a friend, a friend that's a boy, Elijah. The wheelers decide to invite the Byers family (Joyce, Jonathan, Will, El) for two weeks because it's Christmas. It's a tradition that the wheelers and Byers get together for Christmas, Will asks if he could bring his friend. When Will found out he could, He's excited to show his friends, a friend that could be possibly another member of the party. After driving miles to the Wheeler's house, Karen greets the family and says hello to Will's plus one. Karen then calls Nancy and Mike down, Mike didn't know Will made a new friend, nor did he know that Will's friend was coming. As Mike sees this new friend, Elijah, a rush of jealousy goes through him, he's afraid he will be replaced. So it's two weeks of absolute awkwardness and jealousy. (SEASON 4)