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.

To escape his tiring job, weary Murata finds escape at a nearby baseball stadium. While the games are thrilling, it’s Ruriko, the gyaru as cold as the beer she serves but secretly a sweetheart, who keeps him coming back. As her first regular, Murata discovers the warmth behind her frosty demeanor, and their hilarious, heartwarming encounters light up the ballpark and maybe even their hearts.

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.