Spoilers for the first twelve episodes. Obviously.
Things were going really well for Slaine and his relationship prospects until the princess’s double exploded and an interplanetary war ensued. He and his sort-of-but-not-really girlfriend lost all touch. They couldn’t even text each other. But Slaine thought they could weather the storm together. After all, he and the princess had already had their first KISSU a long time ago. They were totally going to get married.
Unfortunately, trouble was brewing on the relationship front.