Original Name: Kaijuu no Kodomo
Drawings and history: Daisuke Igarashi
Genres: Mystery, Supernatural
Ruka, a high school rebel, is excluded from the operation of the club for the duration of the school holidays; heavily bored, she decided to go to spend a day in Tokyo. At nightfall, it will make a strange encounter with Umi and Sora, two boys foreigners who plunge into the dark waters of the Bay of Tokyo,Fascinated by the way they swim, which makes them seem like birds flying, Ruka and the adults who know them are, despite themselves, to be part of a complex gear bigger than themselves. At the same time, the whole world is shocked by an anomaly never seen before, all the fish are disappearing.
For those interested in reading this manga uses the scan findable Here