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....
It'll be fine as long as 
we follow this blueprint.
ستكون الأمور بخير ما دمنا نتبع هذا المُخطّط
Wenn wir uns an den
Grundriss halten, schon!
-Si seguimos el plano, sí.
-¡Es terrible!
-Si seguimos el plano, sí.
-¡Es terrible!
Je t’assure que mon schéma…
Basta seguire il progetto e andrà bene!
Se a gente seguir o diagrama,
deve dar certo sim!
Нужно просто следовать чертежу!
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