In/Spectre’s second season concludes with a wry and clever “quickie” episode—a case that doesn’t seem like a case at all, but simply two good friends regarding a doll-like young woman eating alone at an extremely pricey unagi restaurant. She’s a mystery, and mysteries keep Kajio up at night. He hasn’t been sleeping well since his wife Yukie died.
His bespectacled friend Jujoji serves Kotoko’s role for much of the lunch, theorizing about how rather than the victim of a random mugging, Yukie was actually murdered by Kajio. In fact, Jujoji feels oddly compelled to prosecute his friend because of the presence of the tiny mystery woman eating unaju alone, suggesting she may even be the avatar of Kokuzo Bosatsu, bearer of the sword of wisdom, keeping a slippery criminal (i.e. an eel) from slipping away.
The two friends laugh off their exchange, drink more, and part ways, but unbeknownst to Jujoji, Kajio chose to have lunch at a fancy unagi restaurant because he was actually going to turn himself in to the police for murdering Yukie, so no one else could have her. It is only after they part ways that Kotoko confronts him, and when he addresses her as Kokuzo Bosatsu, she assures him she has no connection to that particular deity.
No, she is confronting Kajio at the request of Yukie herself, who is now a ghost and thus able to communicate with the Goddess of Wisdom. The reason Kajio has been sleeping so poorly and felt a great weight isn’t out of guilt or regret—he’s incapable of that—but the actual physical haunting of his dead wife, who told Kotoko to tell him that turning himself in won’t relieve him of these symptoms.
Suddenly dispossessed from the illusion that he was on the mend, Kajio begs Kotoko to exorcise Yukie from him. But since Yukie isn’t breaking the natural order of things, but is merely exacting righteous retribution upon her asshole husband, Kotoko is disinclined to acquiesces to his request (as a fine pirate once said) and bids him good day.
This makes Kajio angry and resentful to the point of actually considering killing Kotoko in the same manner he killed his wife. However, before he tries anything, he makes the mistake of asking Kotoko what she was doing in a fancy unagi restaurant on her own, which she maintains was a mere coincidence.
So she tells him, in so many words, that she went there to eat unagi because it’s an aphrodisiac, and she’s staying at her boyfriend’s that night, and wants to have lots of great sex with him and maybe get pregnant. Yes, the Goddess of Wisdom and Horniness disarms Kajio with her naked crassness.
Kotoko ends up surprising Kurou by showing up at the end of his shift, and after a stop at the grocery store, head to his place hand-in-hand. She tells him about her day, he calls her ruthless as usual, she says he’s working too long and hard, and it’s high time he give her something long and hard, hopefully tonight. It’s Iwanagi Kotoko at her most raunchily charming best, and as good a way as any to close the book on what is hopefully not the last season of In/Spectre!