Marco was Star's first friend when she came to earth and she thought that her feelings for him would always be just that. But what happens when an old friend of Marco's comes into the picture as well as a new friend of Star's? Will their friendship endure, break, or grow into something more? And what is this strange evil force who seems to have a hand in all of this?

Think of this entire fic as a full season of SvTFOE, and each 2 or 3 chapters is an episode of the show. It can be about anything; from Marco buying a new phone for Star to preventing a Mewni revolution. Anything is possible. Consider this a divergence from the canon.

Star Butterfly is the only princess from another dimensional living in Echo Creek, or so everyone believes. But what if there was another princess who, for her own reasons, ran way from her home dimension? What if Marco already met this princess, but just didn't know it?

Star and Marco have known each other for years. But what happened? Why have the two gone their different ways? Whose fault was it? And how does writing in a journal suppose to help? Find out in this AU of Star vs. Straight up Starco

Star is ready to become a Queen and she will soon leave Earth to pursue her royal duties on Mewni. Despite being more than happy for his magical friend, Marco realizes that he may also have deeper (and unspoken) feelings for her. Things get a bit more complicated when an ancient evil, Lord Deimor, threatens to unleash The Darkness and put an end to the entire Universe. [STARCO]

Marco is jealous when Star and Tom get back together... especially when Tom moves in.