As earth's defenders, they have to fight against threats the earth faces from extraterrestrials. Extraterrestrial design is frequently bizarre, ranging from floating eyes, to alien toys, to heart shaped spacecraft, to a floating weapons factory, to a giant plant. Notably, one is an alien in the form of the Soviet Emblem that uses a hammer-and-sickle attack. The anime ends fairly predictably, with the Daichis becoming a close knit family once again, despite the hurdles faced by them as earth's defenders and their future responsibility as the same.