Children of the Sea

is a Japanese manga series written and illustrated by Daisuke Igarashi. It was serialized in Shōgakukan's seinen manga magazine Monthly Ikki from December 2005 to September 2011. Shōgakukan has collected the series into five tankōbon volumes published between July 2007 and July 2012. The manga is licensed in North America by Viz Media, who serialized it online at SigIkki.com and released the five tankōbon volumes from July 2009 to June 2013. An anime film adaptation by Studio 4°C premiered in May 2019 in Japan. In 2009, Children of the Sea was awarded an Excellence Prize at the 13th Japan Media Arts Festival. Plot On the first day of summer vacation, Ruka Azumi deliberately injures a playmate who had tripped her up. Excluded from the club for all the holidays, she decides to leave for Tokyo for a day. As night falls, she meets Umi, a strange boy raised by dugongs who dives and disappears into the murky waters of Tokyo Port. She finds him a few days later, requisitioned by his oceanographer father, to work in the aquarium he takes care of. But Umi is no longer alone, he is accompanied by Sora, who also has supernatural aquatic gifts.