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....
There were power outages throughout 
the world for a while,
حدث انقطاع في التيّار في أنحاء
،العالم لبعض الوقت
Und weil auf der ganzen Welt
Strommangel herrscht,
El mundo enteró se quedó sin luz
El mundo enteró se quedó sin luz
le monde entier
a dû vivre sans électricité.
Più durava l'interruzione in tutto il mondo,
o mundo todo sofreu com
blecautes por um tempo
некоторое время весь мир
сидел без света,