In the near future, much of the world has been forgotten at the bottom of the ocean due to rising sea levels. Natsuki Ikaruga, who lives in a small town surrounded and stranded by the sea, is invited by a mysterious woman, Catherine, to search for a treasure in his grandmother's house who was a marine geologist. One day, he dives to the bottom of the ocean in a submarine and encounters a mysterious capsule with a girl sleeping inside. The girl was a humanoid so sophisticated that she could be mistaken for a human.
As long as that part you 
brought earlier works properly.
ما دامت تلك القطعة الّتي أحضرتِها
ستنجح كما ينبغي
Es sei denn, dein Teil
von vorhin macht Probleme.
Sempre che quel pezzo
non cominci a dare problemi.
Isso se aquela peça que
você trouxe funcionar.
Лишь бы запчасть ваша
не подвела.