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. [Written by MAL Rewrite]

The "Medicine Seller" is a deadly and mysterious master of the occult who travels across feudal Japan in search of malevolent spirits called "mononoke" to slay. When he locates one of these spirits, he cannot simply kill it; he must first learn its Form, its Truth, and its Reason in order to wield the mighty Exorcism Sword and fight against it. He must begin his strange exorcisms with intense psychological analysis and careful investigative work—an extremely dangerous step, as he must first confront and learn about the mononoke before he even has the means to defeat it. The Medicine Seller's journey leads him to an old-fashioned inn where Shino, a pregnant woman, has finally found a place to rest. The owner has reluctantly placed her in the last vacant room; however, as she settles in, it quickly becomes clear that the room is infested by a lethal band of mononoke, the Zashiki Warashi. With his hunter's intuition, the Medicine Seller begins his investigation to discover the Form, the Truth, and the Reason before the Zashiki Warashi can kill again. [Written by MAL Rewrite]

Born from the corpse of his mother, a young mercenary known only as Guts, embraces the battlefield as his only means of survival. Day in and day out, putting his life on the line just to make enough to get by, he moves from one bloodshed to the next. After a run-in with the Band of the Hawk, a formidable troop of mercenaries, Guts is recruited by their charismatic leader Griffith, nicknamed the "White Hawk." As he quickly climbed the ranks in order to become the head of the offensive faction, Guts proves to be a mighty addition to Griffith's force, taking Midland by storm. However, while the band's quest for recognition continues, Guts slowly realizes that the world is not as black-and-white as he once assumed. Set in the medieval era, Kenpuu Denki Berserk is a dark, gritty tale that follows one man's struggle to find his own path, while supporting another's lust for power, and the unimaginable tragedy that begins to turn the wheels of fate. [Written by MAL Rewrite]