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When Ruka was younger, she saw a ghost in the water at the aquarium where her dad works. Now she feels drawn toward the aquarium and the two mysterious boys she meets there, Umi and Sora. They were raised by dugongs and hear the same strange calls from the sea as she does. Ruka's dad and the other adults who work at the aquarium are only distantly aware of what the children are experiencing as they get caught up in the mystery of the worldwide disappearance of the oceans' fish.
Follows Kimihiko Kimitsuka, a young man who four years ago became the assistant of a mysterious detective known as "Siesta" on a hijacked airplane. Together, Kimihiko and Siesta went on mind-boggling, globe-trotting adventures while combatting a secret organization, but all of that came to an end when they were separated by Siesta's death. In the present day, Kimihiko tries to return to an ordinary, boring life as a high school student, but things are never that simple, even though the detective is already dead.
The story begins in the early Showa era of the 20th century. A mysterious old man on a train relates the disappearance of his older brother three decades ago, near the 12-story Ryouunkaku tower that once stood in the seaside town of Uozu, Japan. The mystery revolves around telescopes, peep shows, and the blurred boundary between reality and dreams.
"After Yuu finds out the past and circumstances of Adachi, he makes a single decision in order to save him."
Power users around the world are suddenly committing suicide one after another, in all cases after a strange fog appears at the scene. At a request from Ango Sakaguchi, the Armed Detective Agency head out to investigate Tatsuhiko Shibusawa, a power user who calls himself "collector," and a man suspected of being tied to the incident.
In order to save her brother and nephew who have been kidnapped by a mysterious religious group known as the Genuine Love Society, Juri and her family cast a spell using a stone hidden by her grandfather to enter the world of stopped time known as Stasis. However, when they infiltrate the kidnapper's base, they're met by other people who can also move about freely. With grotesque creatures lurking about, will they be able to escape the parallel world and return to their normal lives?!