土星マンション [Dosei Manshon / Saturn Apartments]

In the near future, humanity has abandoned Earth's surface to live in a massive ring-shaped orbital apartment complex. Saturn Apartments follows Mitsu, a young window washer who inherits his father's dangerous job cleaning the windows of this towering structure, offering him a unique perspective on the isolated lives of its residents. Published by Shogakukan from 2006 to 2011, this seven-volume manga series by creator Hisae Iwaoka blends slice-of-life drama with soft science fiction, exploring themes of community, loss, and the search for meaning in a closed world. Its quiet, contemplative tone and detailed, atmospheric art make it a standout work in the genre of thoughtful speculative fiction.