We drop into the world of Harold Teen in the middle of the story. It was always the middle of the story.

This might have been the first time the Teen was elevated to important pop-culture status. Wikipedia:

Harold Teen was a popular, long-running American comic strip written and drawn by Carl Ed. Publisher Joseph Medill Patterson may have suggested and certainly approved the strip's concept, loosely based on Booth Tarkington's successful novel Seventeen. The strip ran from 1919 to 1959. Asked in the late 1930s why he had started the strip, Ed answered, "Twenty years ago, there was no comic strip on adolescence. I thought every well-balanced comic sheet should have one.

Lillums was the girl friend. Like other gals of the era, she was a Sheba, and Harold, being a male, was a Sheik, for obvious reasons.