Galactic Mansion

Just before Yokoyama Aoi entered her second year of middle school, her beloved grandfather Tetsuo passed away. To save the apartment building "Aoba-so," which her grandfather had carefully managed, from being demolished, Aoi decided to become its new manager.

As soon as Aoi arrived to greet the residents, she encountered a strange figure with a spherical body (!?) named "Gala-san" at the entrance. Aoi's nerves on edge, wondering if he was one of the rumored Knockers criminals, but when she screamed after being attacked by a suspicious figure, she was confronted not only by Gala-san, but also by the residents who had transformed into grotesque forms. It turned out that all the residents of "Aoba Apartments" were Knockers.

Aoi was relieved to find that her neighbors got along with the rather eccentric residents of "Aoba Apartments" without any problems. However, the Knockers crimes that had begun to occur frequently in Nerima, and the existence of BOOTS, who had declared that they would "eradicate the Knockers," gave her a lingering sense of unease. Thus began Yokoyama Aoi's noisy and challenging daily life.