In a future world where invaders from another dimension have driven humanity to live on floating islands in the sea, Hida Kizuna becomes a member of the elite Amaterasu squadron.  In order to power up the mech suits of this all-girls combat team, he has to... do lewd things to them!?
...b-because I wanted to!
Ich mach das nicht,
weil es mir gefällt!
po-porque lo quisiera!
po-por voluntad propia!
p-per mia scelta!
...d-de propósito!