Can there be a headcanon that when the hive five are seniors in high school, the Riarkle chemistry is off the charts, and since Riley and Farkle are ridiculously oblivious to it, Lucas, Maya, and Zay make up a plan for them to get together.
The plan name? Project PlutoxMars. Or Project Pluto. Or Project Mars. Or Plars? Muto? Marto? Plurs?