Genre: Action, Drama, Horror, Psychological, Sci-Fi, Seinen

 

 Story:

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Suddenly one day, a large number of unidentified creatures fly from the sky. The organism had the property of invading the human head through the nasal cavity and ear canal, parasitizing the entire head including the brain, controlling the entire body, and preying on other humans. The freely the deformable post-parasitic head is no longer that of a human, it becomes sharp like a knife, supple like a whip, and has the strength to kill more than a few humans or even beasts (lions) in an instant. .. The head also looks like a largemouth during predation. However, it usually mimics the human head. Their " parasites " rapidly acquired knowledge and words with their high learning ability and became entangled in human society.
Shinichi Izumi, who was an ordinary high school student until that day, was attacked and parasitized by one parasite but managed to escape the invasion of the head (takeover of the brain). Parasitized Shinichi's right arm and replaced his right hand. He came to call himself " Migi " after his right hand, and the symbiotic life of Shinichi and Migi began. At that time, predation by other parasites (minced murder) occurred frequently all over the world, but it was said to be a simultaneous multiple murder case of an unknown criminal. Shinichi struggles to reveal the truth to the world. On the other hand, Miggy considers only self-protection, is not interested in human life other than the host Shinichi and insists that he is willing to harm Shinichi if he tries to reveal the truth (the existence of Miggy). .. On the other hand, Migi, who cannot live if Shinichi dies, does not hesitate to kill the same kind to protect Shinichi from other parasites if necessary.

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However, such a special relationship between Shinichi and Migi is warned by other parasites. As a high school teacher, Shinichi, who has become hostile to the parasite " Ryoko Tamiya " and her friends, hopes that their parents will not be involved in the battle. Unfortunately, however, his mother's encounters are killed, and is parasitized on a trip to a parasite looking for a new host. Shinichi is upset by the "mother-shaped" parasite that appears at home and is pierced by his heart without being able to fight properly, causing a fatal injury, but Migi is inside Shinichi's body. Resuscitating from cardiopulmonary arrest by entering and repairing the body while moving the heart. At that time, Shinichi, who acquired superhuman physical ability due to the diffusion of Migi's cells into the body, reunites with Parasite who hijacked his mother and achieves revenge. However, Shinichi's changes appear not only in his body but also in his mind, which bothers him. On the other hand, Miggy gradually understands human values ​​through interaction with Shinichi. Shinichi's girlfriend, Satomi Murano, is puzzled by his dramatic changes and the same kindness.

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At that time, in the neighboring town of the region inhabited by Shinichi, a parasite that is considered a savior to bring harmony to the Earth's environment politicians of Takashi Hirokawa was elected to the mayor, incomplete while parasite who also won the society of the secret Will gathers in. Ryoko Tamiya, who left school and changed her name to Reiko Tamura, is cooperating with Hirokawa's attempt, but she is pregnant and gives birth to a baby who is only a normal human being and has no fertility. Think about the identity of Parasite.
"Reiko Tamura," thinks that Shinichi and Miggy's existence will be a guide for the future of the parasites, and sends other parasites and humans for investigation, but Shinichi will fight parasites many times after a misunderstanding. It becomes. As a result, the people around Shinichi are involved and sacrificed, and Shinichi is determined to confront Hirokawa's group. In addition, "Reiko Tamura" is also wary of her own ideas from other parasites, and is chased by Hirokawa's group due to a split of friends. Parasites who regarded "Reiko Tamura" as an enemy collude and attack her, but they are beaten up. However, she also loses her life after being prevented by a human being involved in a series of incidents but entrusts Shinichi with the conclusion and baby she made after thinking.

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After a series of incidents, the existence of Parasite was already known to the police and the Self-Defense Forces, and a sweeping operation was planned for the city hall, which is the base of Hirokawa and others. Shinichi was bought a career of encountering Parasite while hiding that he was parasitized by Migi, and another collaborator, who was detained by the police as a lust murder, but from that career, he became a human being. Accompany the operation with Urakami, who has the supernatural power to discriminate against parasites. With careful preparation, human organizational strength, and an operation that is willing to sacrifice the general public, most of the parasites in the city hall will be eradicated. When Hirokawa realized that he was defeated, he addressed the SDF members who had rushed in, saying that the humans who pollute the global environment are not the primates of all things, but the " parasitic beasts " that prey on the earth, but they were shot dead. To. The Self-Defense Forces members are confused when they realize that Hirokawa, who was regarded as the leader of the parasite, was a human being, but immediately after that, they are attacked by the parasite " Goto ", which has a total of five bodies fused to the head and limbs, and are wiped out. "Goto" regards Shinichi and Miggy, who have been related to each other for a long time, as a nemesis and declares a rematch. In addition, Urakami takes advantage of the turmoil and kills the supervisor, and escapes from the scene.

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Shinichi and Miggy were challenged by "Goto" to escape from the battle, and as a result of failing in the plan of Inui Ichigo, Miggy was taken into "Goto" as a sacrifice to escape Shinichi. It will be lost. Shinichi is disappointed by the size and friendship of Migi who has lost, but he decides to rematch with the help of a strange old woman at the escape destination. Shinichi struggles because he was half desperate, but he seizes the opportunity with the help of toxic industrial waste that has been illegally dumped and regains Migi and reverses. Shinichi, who won, is moved by the appearance of "Goto" desperately trying to survive but hesitates to stop, but in the end, he gives up. When the parasites began to refrain from taking public action in the wake of Hirokawa's case, Migi declared that he would fall asleep for long thoughts based on the experience gained through the temporary fusion with "Goto". Return to your normal right hand.

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A year later, Shinichi regained his peaceful daily life while continuing to associate with Satomi, who was a spiritual supporter in the battle. Meanwhile, Urakami, who had escaped in front of them, reappears. Urakami, who knew that Shinichi had something to do with Parasite, called Satomi as a hostage and called Shinichi to the roof of the building, claiming that he was a lust murderer and embodying the essence of human beings. We seek consent from Shinichi's point of view, which is expected to be an intermediate existence. Shinichi stagnates, but Satomi dismisses Urakami's claim. Shinichi quickly defeats Urakami and reaches for Satomi, who falls from the building, in order to rescue Satomi was pushed down from the roof in front of her, but it is not in time. Shinichi was desperate, but when he suddenly noticed, Shinichi's right arm was grasping Satomi for some reason. Shinichi learns that Migi, who should have been sleeping, helped him. The story ends.