Many years have passed since humanity vanished from Earth, yet the Galaxy Tower hotel in Ginza, Tokyo, continues to operate. At the center of its staff is Yachiyo, a dedicated hotelier robot, along with other employee robots working tirelessly in various departments. Together, they spend what feels like an eternity maintaining the hotel, despite having no guests. As they await the return of their owner and the day humanity reappears. Now, a small miracle is about to change everything for Yachiyo and her robotic colleagues.

Amate Yuzuriha is a high-school student living peacefully in a space colony floating in outer space. When she meets a war refugee named Nyaan, Amate is drawn into the illegal mobile suit dueling sport known as Clan Battle. Under the entry name "Machu," she throws herself into fierce battle day after day, piloting the GQuuuuuuX. Then an unidentified Gundam mobile suit pursued by both the space force and the police appears before her, along with its pilot, a boy named Shuji. Now their world is about to enter a new era.

The love between brother and sister. The love between man and woman. That which is most forbidden is most unyielding. The two sons and five daughters of the Shiunji family shine like brilliant gems, each with intelligence and beauty in equal measure. And with the pedigree of their wealthy father behind them, how could they not be the talk of the town? Eldest son Arata has spent his life being tossed around by the whims of his colorful sisters, yet a little teasing won't stop him from valuing his family over anything and anyone else. But when his youngest sister turns fifteen, their father reveals a long-hidden secret of the Shiunji "siblings" and knocks Arata's world off its axis...

School x Supernatural x Mystery. This story takes place before the exorcist Kyougokudou opened up a used bookstore... Our setting is in Tokyo in 1948, just right after the war. Kanna Kusakabe had just become a second-year at a high school when she meets the new language teacher, Akihiko Chuuzenji. Mysterious supernatural things keep happening around Kanna. Once again today, Kanna is going to open the doors to the library prep room to seek help from the surly Chuuzenji-sensei who is waiting inside. A high school supernatural mystery featuring the unlikely duo between a teacher and a high school girl is about to begin!