A kid with no past and a dragon ruling the galaxy tear through space looking for treasure, then suddenly it becomes about finding her mother. The shift from "adventure buddies robbing the cosmos" to "searching for home" lands because the show doesn't telegraph it. One OVA episode and it trusts you to feel the weight of that question without explaining why it matters.

Marco, an orphan whose memories are incomplete, hunts for treasure across space with Arco, a dragon who holds dominion over the galaxy. On one of their outings, Marco is handed a hint about where her mother might be. That lead sets their next destination: Earth, the world where Marco was born. The single-episode OVA mixes adventure and comedy, and it came as a bonus Blu-ray with the physical edition of the PC adventure game of the same name.