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.
They stopped producing Humanoids that 
were human-like quite a while back.
توقّفوا عن إنتاج البشر الآليّين الّذين
يُشبهون البشر كثيراً منذ مدّة
Menschenähnliche Humanoide wie sie werden
schon seit Ewigkeiten nicht mehr produziert.
Hace mucho que se canceló la producción
de humanoides tan similares a nosotros.
Hace mucho que se canceló la producción
de humanoides tan similares a nosotros.
Ça fait une paie qu’on produit plus
ce genre d’humanoïde ressemblant.
La produzione di umanoidi
simili agli umani
Já faz bastante tempo que pararam de fabricar
humanoides tão parecidos com humanos.
Настолько похожих на людей гуманоидов
перестали выпускать довольно давно.