Sókjú no Fafner: Dead Aggressor - Arcadian Project

Before an aggressive alien race suddenly attacked their quiet, isolated island, Kazuki and his friends knew only a life of peace. Now the people of the island look to the teenagers as their last hope for survival. As the only ones capable of controlling highly-sophisticated secret weapons—the Fafner—these young pilots fight desperately to protect their loved ones, as well as their own identities. (Crunchyroll)