The four schoolgirls stranded on a desert island are building a boat to escape, even as they struggle to survive. While they gather the materials, over a hundred bamboo stalks (more than 1.5 tons of it!), they contemplate their lives when they get back to society. And after Homare begins maritime training for the others, Mutsu, who is a bad swimmer, is revealed to have a fear of the sea?! Don’t miss the exciting seventh volume of this desert island survival story!