Sounan desu ka?

is a Japanese manga written by Okamoto Kentarou and Sagara Riri. It has been serialized since January 2017 in Kodansha's Weekly Young Magazine. The manga is published in North America by Kodansha Comics. An anime adaptation by Ezo'la began airing in Japan from July 2, 2019.

Plot
Four high school girls are stranded on a deserted island after surviving a plane crash. How can they survive?