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....
For a power generator, it doesn't matter 
if it's wind power or nuclear power.
بالنّسبة لمُولّدة طاقة، فلا يهمّ إن كانت
طاقة رياح أو طاقة نوويّة
Herkömmliche Stromerzeugung,
sei es durch Wind oder Atomkraft,
Da igual si es viento,
energía atómica, etcétera.
Da igual si es viento,
energía atómica, etcétera.
Pour y parvenir,
il faut simplement réussir
Nella produzione energetica,
che sia eolica o nucleare,
Para gerar energia, seja eólica,
nuclear ou qualquer outra,
Что ветряные, что атомные
электростанции
เครื่องกำเนิดไฟฟ้า
ไม่ว่าจะด้วยแรงลมหรือพลังงานนิวเคลียร์