"Red Eyes" is a manga series set in a dystopian future where humanity is under constant threat from bioengineered creatures known as Necro-Roids. These creatures, created as weapons of war, have turned against their creators, leading to widespread destruction and chaos. The story centers around Akira, a young soldier who becomes the host of a powerful Necro-Roid named Blade after a failed military experiment. Blade grants Akira enhanced abilities but also poses a constant risk of consuming his humanity.

Akira joins the Red Eyes, an elite military unit tasked with combating the Necro-Roid threat. The unit is composed of individuals who, like Akira, have fused with Necro-Roids, giving them extraordinary combat skills but also making them outcasts in society. The team includes characters such as Rei, a skilled sniper with a tragic past, and Kaede, a strategist who struggles with the moral implications of their missions. Together, they face not only the external threat of rogue Necro-Roids but also internal conflicts stemming from their own unstable conditions.

The narrative explores themes of identity, morality, and the consequences of unchecked scientific advancement. As Akira and his comrades battle increasingly powerful enemies, they uncover dark secrets about the origins of the Necro-Roids and the true intentions of the government and military factions controlling them. The story is marked by intense action sequences, moral dilemmas, and the psychological toll of living as both weapon and outcast. The characters’ struggles with their dual natures drive much of the emotional weight of the series, as they grapple with the fear of losing themselves to the very creatures they are fighting against.