This story is divided into eleven episodes, complete with episode breaks and "coming next episode" trailers. Combining advanced mecha combat against the terrible invaders known as the Seekers with a great erotic bishoujo story that you control. Can the crew of the Battleship Sakigake defeat the menace to mankind?

It is the 22nd Century, a futuristic world of scientific wonder, yet at its core not so different from our own. You are Souichiro, a member of the Space Defense Force who is somewhat bored with his life - until the arrival of the Seekers. The Seekers are a fierce and terrible alien life form that launches attacks without warning, laying waste to everything in their paths.

But there is hope for humanity: the great battleship Sakigake, which fights the Seekers under the command of beautiful with the help of the advanced robots known as "Justice." Piloted by a team of beautiful girls, they use tactics to beat the terrible enemy back, fighting on Earth, in space and in the deserts of Mars to defend the human race.