Description:

All of a sudden, they arrived: parasitic aliens that descended upon Earth and quickly infiltrated humanity by burrowing into the brains of vulnerable targets. These insatiable beings acquire full control of their host and are able to morph into a variety of forms in order to feed on unsuspecting prey. Sixteen-year-old high school student Shinichi Izumi falls victim to one of these parasites, but it fails to take over his brain, ending up in his right hand instead. Unable to relocate, the parasite, now named Migi, has no choice but to rely on Shinichi in order to stay alive. Thus, the pair is forced into an uneasy coexistence and must defend themselves from hostile parasites that hope to eradicate this new threat to their species. (Source: MAL Rewrite)

Description:

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. 20 years ago Yuji Kaido, who has a mysterious disease, is put into suspended animation until a cure is found. When he wakes up Yuji learns that it’s been more than 20 years since he was put into suspended animation, and the world is now controlled by these creatures. He then decides to join a group of soldiers fighting against the Blue for hope of a better future. (Source: ANN)