Inside the first floor of the earthen ritual chamber...
Having finished its role as a ritual chamber, the space had quickly been transformed into a little banquet hall by the hands of some humans and youkai.
Sukune: "I see, I see. So thus, the sacred treasure "Opener of Casks" was bo~orn!
Man, I can hardly believe m'skills had devel'ped this far, nyah! Ahahah~"
Yaorochi: "This is no laughing matter. You do realize that this goes far beyond just making a dull blade, yes?
You turned it into a bottle opener!"
Tsubakura: "What's this, now? You really shouldn't make light of bottle openers.
They're legendary devices that use basic modern mechanics to bring about multiple simultaneous interactions based on the ratio relationship between a system's load point, operating point and working point, enabling their wielder to exert many times more force than they otherwise would." (<--lie)
Sukune: "Exactly, nyah! Exactly!" (<--you knew that already??)
Yaorochi "Is... that so? In the outside world?"
Yaorochi was exasperated, but didn't have enough knowledge to actually refute any of that.
While making a still-skeptical face, they stuffed a whole roasted lizard from their plate into their mouth.
Yaorochi's face relaxed just slightly; it seemed that Hooaka's roasts were quite well-prepared.
Tsubakura, looking on, thought "isn't that like one step removed from cannibalism?", but didn't say it out loud. They were chowing down on a lizard of their own.
Instead, Hooaka took the opportunity to say exactly what Tsubakura was thinking.
Yaorochi: "One step indeed, yes. Since lizards still have the legs that snakes grew out of." 
Aoji began to choke on their own lizard at their nearby seat for some reason,
but apparently Yaorochi didn't have any problem with eating it.
Tsubakura muttered, "well then, maybe we should go catch some snakes in their nests for our next dinner,"
but this prompted Yaorochi to shoot them a furious glare.
Looks like snakes were off the menu, regardless of lizard policy.
Time passed quickly, as the group continued having similarly-pointless conversations.
Before one knew it, it was already the darkest hour of the night.
Both the sake from Sukune's house and the sake brought from the shrine had been drunk to the last dregs.
Yabusame: "There'sh alr'edy no sake le~eft.
Don'tcha think *hic* we didn't bring enougfh?"
Kuroji: "You all just drank too much."
Yabusame complained to the rest of the room, their face beet-red, while they stared a hole into the bottom of their sake bottle.
Kuroji answered them, their face no different from usual.
Sukune: "Aww... m'whole half-year's supply of sake went 'poof' sho fast..."
Yaorochi: "That works fine, honestly. Let's call it a day."
Tsubakura: "Naw, hang on, you an' Kuroji haven't had any yet. Ain't that right?"
Kuroji: "I can't drink."
Tsubakura: "Yeah, I'm aware. But you can have some, right, Yaorochi?"
Yaorochi: "I shall most certainly not. It'll bring up nothing but bad memories."
Tsubakura: "Whaaat, once bitten, twice shy? When biting's a snake's job in the first place? No way. 'Can' means 'do'. Down the hatch."
Yaorochi: "Tch. You really know how to make a nuisance of yourselves."
Kuroji: "Exactly. In the first place, there's no sake left."
Tsubakura: "We're still practically drowning in the stuff over at the shrine. Just go get some'a that."
Yabusame: "Oh, that's right. So who's gonna go~?"
Kuroji: "I'm not drinking, so I have no need to go out."
Tsubakura: "Do you really think we'll accept an argument that illogical?"
Yabusame: "Do you really~?"
Sukune: "Do yaa~?"
Kuroji: "If this is illogical, then why don't you come up with something worthy of being called logical?"
Tsubakura: "Yeah, a'ight. How about we decide this with something that nobody will have hard feelings over...?"
Yabusame: "What'll we decide with~?"
Kuroji: "We have no dice or cards..."
Tsubakura: "Rock-paper-scissors or a fight to the death. Which d'you like better?"
Yaorochi: "That 'rock-paper-scissors' was quite interesting. I can hardly remember seeing anything like it."
Sukune: "It reminded me of tou-hachiken, nyo!"
Yaorochi: "It seems that the Outside World's culture has developed quite differently from ours, yes. I heard that they still have to use special tools to shoot bullets out there, too."
Sukune: "They don't have special powersh like spiritual power or mana either, do they? That must be sooo inc'nvenient! How d'they even live like that?"
Yaorochi: "They have their own way of life, just like us. There are as many ways of life as there are human beings... Things are no different for those of our kind, either."
Sukune: "Hm...? Something 'bout that sounds strange, nyo?"
Yaorochi: "What about it?"
Sukune: "That cheesy line of yers jusht now... I feel like I've heard it before, nya? Or maybe I'm imaginin' thingsh..."
Yaorochi: "...Your memory is hardly reliable, after all."
Sukune: "Ahaha~, y'sure are right about that!"
In the end, Sukune couldn't remember just what it was that had given them pause.
They didn't have much confidence in their recollective ability, so they probably didn't feel like putting in the effort to dig up something that they'd already forgotten.
Despite the fact that the very memory they'd forgotten had been the reason the whole incident started...
That scene, which Sukune had failed to remember.
A face with eyes resembling those of the youkai sitting before them, and a mouth from which a similar comment had come forth.
That name, which Sukune had failed to remember.
A name with the pronunciation "Adagumo," and with a character meaning "snake".
That figure, which Sukune had failed to remember.
The form and attire of the one who had both commissioned, and designed, the "Vessel of Tasouken".
---Mugenri, cloaked in the darkness of night.
The true form of the shadow hidden behind the veil of the incident.
On this night, a single drunkard running down the moonlit road
would encounter another side of the incident as a whole.