James met Severus on the Hogwarts Express in their first year at Hogwarts, and the two immediately got off on the wrong foot. James scoffed at Snape's desire that he and Lily Evans would be Sorted into Slytherin house, while Snape sneered at James's hope that he would follow his father's footsteps and end up in Gryffindor. This enmity would continue for the rest of their school as they didn’t know their baby child from the future who was three years old and they didn’t realize that since they go on as as first years