The deepest ocean observed by mankind is known as the hadal sea.
Would an ocean unobserved by mankind still be part of Hades?
Or perhaps, instead…?
BGM: To Whom Does the Erebal Sanctuary Belong?
How did I let myself get dragged into this.
“How did I let myself get dragged into this…?”
“An’ why do I hafta come with…?”
Hello. Tsukushi Awakihara here.
Despite how I’m complaining in my not-so-internal internal monologue, I’m still dutifully walking across the sea floor.
It’s been some time since I resolved the marine incidents, and as of today, both the rumors in town and my personal circumstances have finally settled down. I’m currently out on an undersea investigation.
“Urgh. Big Sis Kyouga was grinning so wide when she said I oughta stick with you, too…”
“Ah, ahaha…”
As it happens, I’m also accompanied by Tenpyou, one of the Kaikeidou’s resident Kai sisters. I haven’t heard too many of the details from her, but apparently her eldest sister, Kyouga-san, told her something along the lines of “y'better get yourself in fighting form!” The reason I’m using rather ambiguous language is because I was given my briefing from Lady Otohime, not from Kyouga-san herself.
——–
“So… below the Kaikeidou, you say?”
“Yep! See, there’s this youkai down there that’s kind of dangerous. And since you are our shrine maiden and all, I was hoping you could head on down and do a little exorcism job?”
“An exorcism…? What, like it’s as easy as a trip down to the corner store…?”
Shortly before Tenpyou met up with me, Lady Otohime came to speak to me in the Kaikeidou. ‘Exorcism’ meant beating the youkai in a fight, essentially. It’s only within the past little while, however, that I’ve finally managed to consistently beat all the Kai sisters, so this new request sounded absolutely impossible to me. I gave Lady Otohime a dubious look.
“Aw, don’t look so glum. You’ve been doing all this training by playing with the Kai sisters, so I thought I’d do you a little favor and give you an opportunity to show off the results of that effort!”
“This isn’t one of those things where your 'little favor’ is an errand run in all but name, is it?”
Lady Otohime declined to respond further.
——–
“*sigh*… Honestly, how did I let this happen? I really have to start practising how to say 'NO’ more.”
Lady Otohime just continued to wordlessly grin at me, but in the end, I reluctantly decided to obey her directions. Which brings us to now.
As for where I am now, well, I’m down in the ocean.
Not just any part of the ocean, though. I’m in the very furthest of the sea’s depths, down in the dark waters that people might call 'the abyss’. And I’m headed even deeper right now.
“So there’s still room to dive even further beneath the Kaikeidou, it seems.”
“Yeah! First I ever heard of it, though. I’m usually stationed around the front gate, or up on top of the water if I’m lucky…”
The Kaikeidou is already at the bottom of the ocean, of course, but right now, we’re going out the back gate and down another slope located behind it. There was one time when I asked Lady Mikoto– the ruler of the Kaikeidou– about the building’s depth, but…
(The Kaikeidou can always be found at the furthest depth that humanity has yet observed.)
…was the rather vague response I received. I tried to ask Lady Otohime about the same thing, but she just said I ought to study more. I never did find out just how far down the place was, in the end.
“The furthest depth… that they’ve yet observed…?”
“Hm? What’s up, Tsukushi?”
Apparently having noticed my puzzlement, Tenpyou calls out from where she’s swimming alongside me.
“Oh, I was just– wondering how far underwater the Kaieidou is located…?”
“How far? Oh man, it’s like, SUPER deep! Like, waaay down.”
Tenpyou sticks her chest out proudly, answering with the utmost of confidence. I do tend to wonder, every so often, why Tenpyou is the only sister who’s so… um. Hm. How should I put this. Not the most… no, actually, you know what. Never mind.
“I did ask Big Sis about it this one time, though. She said, like, there’s this boat? Called the, uh, somethin’-or-other Tori… something? And it was, like… ehh. Yeah, I don’t remember it that well…”
“A boat named 'tori’… well, I’ve heard a story about the Ame-no-Torifune? ”
“Nah, not that. Lemme see here… uh… hrmm…”
Tenpyou continued to tilt her head from side to side and grunt in an attempt to remember, but after several minutes passed with no answer to show for it, we shrugged awkwardly and continued our deep-sea trek.
……..
I can’t say for certain how long it took us, but after a good chunk of time spent aimlessly moving forward through the dark water, we were greeted by a bed of white sand.
“Seeing as we’ve hit sand again, I would assume that this is the deepest we can go?”
“It kinda looks like Suimei’s old post, yeah.”
I figure that the ground here is alright to stand on, so I touch down and try to survey our surroundings. The bubble from Lord Watatsumi surrounding me has begun to faintly glow, illuminating the area somewhat, but the light’s still not bright enough to make anything out.
“Lord Watatsumi, could you perhaps brighten things up a little more? …I– huh?”
“What’s up? Is your Lord Watatsumi sayin’ somethin’?”
Upon asking them about the light, Lord Watatsumi simply replied that “you need only continue in the direction you’re facing.” I still can’t see anything, but– perhaps anticipating my next question– they add that I’ll “understand upon reaching the destination.”
“Um, they say we should… well, I’m not sure which direction this actually is, but the direction we’re facing right now should be fine.”
“A'ight! We’ll let Tsukushi’s Lord Watatsumi lead the way!”
As soon as I relay Lord Watatsumi’s instructions to Tenpyou (admittedly with a fair bit of skepticism in my voice,) she immediately begins marching off in the indicated direction. I hurriedly dart forward to keep up with her surprisingly fast pace.
“…Huh? Oh, ah, I see. My apologies; I suppose I really should do some more studying.”
“What’d yer Lord Watatsumi say this time, Tsukushi?”
Shortly after we begin walking, I receive a brief remonstrance from Lord Watatsumi. Having heard my apology, Tenpyou turns to face me.
“Oh, it’s just– I mentioned the Ame-no-Torifune a while back, but Lord Watatsumi has pointed out that 'Tori-no-Iwakusufune-no-Kami is actually the name of a flying ship, and the god thereof, as opposed to a ship that can dive like a submarine’.”
“Mm~mm…”
Since they went so far as to speak directly into my mind about it, it seems that Lord Watatsumi is quite invested in the topic.
“…..OHH!!”
Moments after hearing that, however, Tenpyou whips around to speak to me again.
“A submarine! I remember now! It was one of those– ship things, yeah, that humans use to dive underwater!”
“A submarine… oh, you mean what we were talking about a while ago?”
“Yeah! That’s the thing Big Sis was talking about! It was the… yeah, the Trieste! The "Bathy-something Trieste,” it’s a submarine, and, like– she said it’s got somethin’ to do with somethin’ about the Kaikeidou!“
A submarine. Those are capable of travelling through the deep sea, certainly. I hardly know any details or history about submarines, though, so I have no idea what this 'Trieste’ is like. I vaguely remember reading about a Japanese submarine called the 'Shinkai’ in a textbook when I was little, but that was a long time ago.
"Guess I’ll look up stuff about submarines the next time I get the chance, then… …oh. ”
Right after I mumbled that to myself, my and Tenpyou’s eyes slowly widened as we saw what lay at the end of our path.
……..
“Wha…? ”
“W-woah… what’s up with all this…?”
Here– down even further than the deepest sea, where it’s too dark to even see the tip of your nose– Tenpyou and I saw…
A long, straight road of stone tiles, even more solemnly maintained than those of the Kaikeidou’s castle town.
A line of crimson-painted torii gates stretching down that road– possible even so many as to number thousands.
And row after row of stone lanterns, eerily illuminating both of the above.
“Is this… a shrine road?”
“Woa-ho~ah…”
The place has a different atmosphere than the Kaikeidou… much more simple, and tranquil. The weight of its presence is overwhelming; both I and Tenpyou are at a loss for words. But why would something like this be here? A near-perfect replica of a building from up on land, sitting this far down in the ocean?
I fearfully appoach one of the torii standing in the sand, and touch it. It’s smooth and glossy, to the point where I can feel it through the film of Lord Watatsumi’s bubble. I glance down at the tiles and touch one of them too; unlike the Kaikeidou’s delicate, finely-carved stonework, these are far rougher, almost looking like they’ve been jammed into place.
I don’t know how long any of this has been here, but the torii look almost brand-new, without any splinters or peeled-off spots. And despite how rough they may be, the tiles have been arranged so it’s easy to walk on them. This must mean…
“There’s someone maintaining this place? At this far of a depth…?”
“What?! No way! Like, this is even further down than the Kaikeidou, yeah? Who would come all this way an’…”
Tenpyou emits a loud cry of astonishment at my words. She quickly claps a hand over her mouth, though, seeming to have remembered something.
“There’s a dangerous youkai beneath the Kaikeidou.”
I remember the instructions Lady Otohime gave me before coming here.
The reason that Tenpyou and I came all this way.
A stone road and torii that somone’s been maintaining.
There’s no one coming down here to tidy the place up. Someone’s living here in this shrine.
“Uh, Tsukushi…?”
“Yes… it seems like this is the place.”
We have no idea what might be lying in wait in the shrine up ahead. Nevertheless, Tenpyou and I take a deep breath, and begin walking down the road of torii that serve as that shrine’s gate.