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.
More importantly, could 
you remember already?
المهمّ، هلّا تذكّرتِ بسرعة؟
Erinner dich lieber,
was dein Befehl war.
-Acuérdate pronto de esa orden.
-Qué remedio.
-Acuérdate pronto de esa orden.
-Qué remedio.
Au lieu de bouder,
retrouve la mémoire.
Piuttosto, sbrigati a ricordarti l'ordine.
Aliás, tente se lembrar de uma vez.
Лучше вспоминай давай быстрее.