Obata Yousuke lives on Pagopago in the Fiji archipelago with his father Tetsuo, a specialist in oceanographic biology. After a storm strikes the island, Yousuke rides to the lagoon with his Jet Ski and finds a strange baby dinosaur there. He takes it to his father's laboratory and names it Coo. Coo grows and seems to be a large marine reptile (a baby plesiosaur) which lived there some 65 million years ago. But Coo soon becomes an object of interest for the French secret service, assigned to protect the nuclear interests of France in that otherwise peaceful part of the world.

Silent Sky is a combination of the additional episodes 13 and 14. It consists of the story in the future, three months after the incident that was similar to "New Generation Madness" and the disease Chaos Child Syndrome that brought by the past earthquake in Shibuya.

In a future governed through the lens of a camera, where people eat synthetic food and pursue an online existence in lieu of physical contact, a group of children begin meeting up in the real world. The aloof Ayumi Kono, the genius hacker Mio Tsuzuki, and the socially awkward Hazuki Makino set out to find the fourth member of their group, Yuko Yabe, who has gone missing. With the help of Myao Rei, an unregistered citizen proficient in martial arts, they are able to find Yuko. However, when their situation takes a sudden turn for the worse, the group stumbles headlong into a dark mystery that challenges everything they know about their world.

Armed Detective Agency members discuss the most suitable candidate for the second-in-command. Doppo Kunikida is carrying out official errands as planned in his diary as usual. Unexpectedly, a bomb-related incident occurs, challenging the ideals he has always upheld. When weighing one life over hundreds, how will he proceed?