For years, Yuno has dreamed of attending Yamabuki Arts High School, but now that she's been accepted, it means the scary prospect of moving away from her home and family for the first time! Fortunately, Yuno quickly learns that if her new neighbors at the eclectic Hidamari (Sunshine) Apartments aren't technically family, at least the majority share the bond of being fellow art students. From second year students like Hiro and Sae, who try to behave like helpful older sisters (mostly successfully) to her hyperactive new neighbor, classmate and best friend Miyako (who has the scariest apartment ever) Yuno begins to build the support network she'll need for dealing with strange characters like her oddly masculine landlady, her cosplay obsessed home room teacher, her tooth-chattering principal and all of the other odd denizens who inhabit her chosen world of art.
The series begins in U.C. 0001, at the very beginning of human space colonization, when a space colony called Laplace is destroyed during a ceremony hosted by the Federation's Prime Minister ushering in the Universal Century dating system. The main story takes place in UC 0096, sixteen years after the end of the One Year War, three years after the events of Mobile Suit Gundam: Char's Counterattack, and 27 years before Mobile Suit Gundam F91. The story revolves around Banagher Links, a seemingly normal boy living and going to school in the space colonies. His life changes one day when he meets a girl named Audrey Burne, as the encounter brings him into contact with a new Gundam and its connections to an item called "Laplace's Box."