Endo Kenji grew up in late-1960s/early-1970s Japan, at a time when American phenomena, notably the space race and the era of Woodstock, were resounding around the world. An avid reader of manga who often saw apocalyptic scenarios playing out, he always responded with the cry of "I would fight!" During this time, he and his friends made up a scenario for world conquest in order to play heroes.

Flash forward to 1997, a time where Kenji has taken charge of his families liquor shop and turned it into a convenience store. He is now raising the daughter of his sister, Kiriko (who disappeared immediately after leaving her daughter to Kenji), and living a fairly ordinary life. However, after events from the prophecy he made up earlier begin to come true, he learns of an evil organization, led by a masked man called "Friend", which is using his plans to conquer the world. As the organization's hold on the government strengthens, he becomes a wanted man and lives on the streets, continuing to (covertly) oppose Friend, partially through terrorism and partially through a protest song he wrote (named "Bob Lennon").

He supposedly died from an explosion on the Bloody New Year's Eve. However, he survives, although we do not know of any of his actions prior to meeting Damian Yoshida, guitarist of the band the Eroim Esseims, in 2014. It appears that he may have been suffering from amnesia at this time, as he identified himself as the devil (in a reference to the real life Blues legend of Robert Johnson, said to have influenced rock 'n' roll.)

He then continued to wander Japan until the third year of the Friend era (the era in which Friend was declared president of the world), when a sudden surge of memory causes him to recall his identity. While heading to Tokyo, he meets up with old friend Konichi, now a radio DJ who, oblivious to Kenji's true identity, records his song (a version of "Bob Lennon" with modified lyrics) and subsequently broadcasts it on radio. As Kenji makes his way past border guards now under Friend's control, using charisma and song, he gains more and more of a following. Once he reaches Tokyo, he confronts Friend and watches him and another old friend, Sada Kiyoshi, die together in an explosion. Finally, he reunites with his old friends and niece, and there the story ends.

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