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.
But you really shouldn't do that 
without permission, should you?
لكن لا ينبغي أن تفعلي ذلك
من دون إذن، صحيح؟
Aber … das geht doch nicht …
No sé si pueden hacerlo sin permiso.
No sé si podéis hacerlo sin permiso.
Je ne suis pas sûre
que vous ayez le droit…
Però non puoi deciderlo tu da sola!
Mas você não devia 
fazer isso sem permissão...
Но разве можно так вот
распоряжаться ей?