Adventure Comics#282(1961)

Lana Lang is once more trying to win Superboy's affections, when the Boy of Steel is summoned to a cave near Smallville where he meets a super-hero calling himself Star Boy. Coming from the 30th Century and the planet Xanthu, Star Boy explains that he has similar super-powers to Superboy. He goes on to explain that he is also a member of the Legion of Super-Heroes, and that he has traveled into the past to stop two Xenthuian criminals who had escaped into this era and are hiding out on Earth. However, Starboy's X-ray vision cannot penetrate copper and so has asked Superboy's help who's x-ray vision will be able to see through the copper piping used in Smallville's water system to find the criminals, who have been hiding in underground caverns. Lana Lang stumbles upon the two young heroes just as they finished capturing the Xanthuian criminals, and in order to get Superboy jealous, Lana bluffs Star Boy into believing she overheard his secret identity and forces him to pretend to be her boyfriend in order to make Superboy jealous. Traveling to the 30th Century with Superboy and Star Boy, Lana has the latter do whatever it takes to try and make Superboy jealous. However, Superboy sees through this ploy and ignores everything and even goes so far as to "date" a Xantharian girl, which causes Lana herself to become jealous and admit to the whole deception. With Lana having learned her lesson, the two teens from the 20th Century return to their own time.