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....
I guess Ryuuji is also 
being of use to Natsuki.
أعتقد أنَّ ريوجي مُفيد لناتسكي أيضاً
Er hilft Natsuki also auch?
Dieser Ryuji …
Ryuji también le es útil a Natsuki.
Ryuji también le es útil a Natsuki.
Ryûji a réussi à venir en aide
à Natsuki, à sa façon.
Date tutti quanti una mano al signor Natsuki.
Parece que o Ryuji também...
vai ser útil ao Natsuki, não é?
Даже Рюдзи приносит пользу Нацки, да?
เขาก็เป็นประโยชน์ต่อคุณนัตสึกิ
ได้เหมือนกันสินะคะ