Although this sequel picks up just several years after original story ends in the early-mid Forties, the new story occurs 15 years later with barely-aged characters living in the early Sixties.
When Nils (Gunnar Hellström) picks up Selena, his car has blue New Hampshire license plates, but when he drops her off at her home a few minutes later, his car has black and gold New York plates.
Throughout the film, it is insisted that Selena and Ted had been friends and nothing more. However, in the first film, they did in fact have a romantic relationship as teenagers and were planning to get married.
In this sequel, Ted Carter is not only wealthy but has a controlling mother. In the first film, Ted had to work and save for law school, and his parents were not featured in the original. It was Norman Page who had a domineering mother in the first film.
American Film Institute Catalog of Feature Films 1961-1970 identifies Gunnar Hellström's character as "Lars" instead of "Nils."