Natsuki sets his heart on creating a tidal power generator that utilizes the ebb and flow of the ocean's tides. He dives back into the ocean to find some materials and salvages some resin from the ruins of Ryuuji's family's factory. As soon as he gets back he gets to work. As they are working, Natsuki and Ryuuji exchange heated opinions over how the generator should be built. Atri intervenes and the two guys become closer friends. Meanwhile, a suspicious-looking character peeks at them from outside of the school....
If someone managed to create a Humanoid 
that's no different from a human being...
إذا تمكّن شخصٌ من إنشاء بشريّ آليّ
...لا يختلف عن كائن بشريّ
Si existiera un humanoide
casi idéntico a un humano,
Si existiera un humanoide
casi idéntico a un humano,
Quand un humanoïde ressemble
à s’y méprendre à un être humain,
Digamos que exista um humanoide que
é exatamente igual a um humano...
Если создадут гуманоида,
ничуть не отличимого от человека,