After Jim and Ruka's mom track down Anglade's yacht, they discover that the rogue scientist, Umi, and Ruka are not on board. When a strange invitation is offered to Jim, Ruka dives into the memories of her daughter as the changes in the sea continues around the globe.
General Note
Printed Manga-style: book opens from left to right; pages are read from right to left.
Translation of: Kaiju no kodomo.