Because the teller of the tale, who has been summoned by the heroine to defuse the situation, despite having been her nemesis since the very outset of the series, isโin the absence of the equally shady adult, Oshino, who at least was an expertโnone other than his college frenemy, the fake ghostbuster who doesnโt believe in ghosts, the shameless swindler Deishu Kaiki.
And it is indeed a con that he agrees to perpetrate, uncharacteristically pro bono, on a wrathful godโa mythic undertaking if true, which it may be, when a liar among liars holds that his story, like any other, is all a lie. But maybe not, when a man who claims to be wise in the ways of the world sounds just as self-conscious as his adolescent counterparts or a Russian anti-hero.