Description:

They arrive in silence and darkness. They descend from the skies. They have a hunger for human flesh. They are everywhere. They are parasites, alien creatures who must invade–and take control of–a human host to survive. And once they have infected their victims, they can assume any deadly form they choose: monsters with giant teeth, winged demons, creatures with blades for hands. But most have chosen to conceal their lethal purpose behind ordinary human faces. So no one knows their secret–except an ordinary high school student. Shin is battling for control of his own body against an alien parasite, but can he find a way to warn humanity of the horrors to come? (Source: Del Rey)

Description:

Ryuu Yamada is a second-year student at Suzaku High. Ryuu is always late for school, naps in class and gets abysmal grades. His life is a dead bore. The beautiful Urara Shiraishi, on the other hand, is Suzaku High's brightest student. One day, without explanation, their bodies are swapped! Ryuu ends up in Urara's body, and Urara in Ryuu's. (Source: MU) Includes the side stories Muramura and Sobasshi no Ryouri Yacchimauzo★

Description:

Gengo Kurosaka leads a normal life until a run-away alien called "Six-eyes" decides to take refuge in his body. From then on, Gengo becomes Ishtar's target, a beautiful alien in charge of making sure the aliens don't turn planet Earth into hunting grounds. Gengo has now to learn to coexist with his parasite to stay alive...