Blue Gender: The Warrior

It is a time of chaos. Earth is no longer what it used to be. It has been infested with a bug like species called the Blue. Yuji Kaido, who has a mysterious disease is put into suspended animation untill a cure is found. When he wakes up Yuji learns that its been more than 20 years since he was put into suspended animation, and the world is now controled by these creatures. He then decides to join a group of soldiers fighting against the Blue for hope of a better future

Synopsis from Anime News Network