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.
Wait, did he just... mock me?
لحظة، هل سخر منّي... للتو؟
Wurde ich gerade …
auf den Arm genommen?
¿Acaba de burlarse de mí?
¿Acaba de burlarse de mí?
Mon maître ne viendrait pas
de se payer ma tête ?
Per caso...
Espera aí, ele estava...
me ridicularizando?
Он что, за дурочку меня принял?