Brigadoon: Marin & Melan

Marin is an ordinary junior high school girl with a cheerful personality and a caring adoptive family. Her life turns upside down when a strange mirage appears in the sky worldwide. Deadly androids known as Monomakia descend from the sky formation called Brigadoon, targeting Marin. While fleeing, she finds a blue bottle in a shrine, and from it emerges an alien protector-Melan Blue, armed with a sword and a gun. Together, they must fight to save Earth while navigating family struggles, school prejudice, and police interference. Along the way, they uncover secrets about Marin's past and Melan's mysterious mission, learning to trust each other in the process. The story is set in 1969 Japan and features a vibrant mix of allies and adversaries.