Chapter Text
“It’s okay, I can handle this," you assured yourself out loud on an Inazuman plain.
Being an Omega Adventurer sucked sometimes... well... almost all the times, actually, but you handled this before and you'd handle it again.
You had spent a good several weeks in the archipelago, learning about its culture, terrain, and enemies. You were especially fond of the youkais, as told by a friendly local named Thoma. Inazuma was a land of many mythical creatures, from a tanuki to a kitsune. The Guuji from the shining, red shrine on the top of the mountain was one, you've heard. That was very exciting.
... There was nothing exciting about you now, though, you came back to reality, with your heaving breath and beads of sweats on your skin.
You found a big stone to leaned against, half-standing. The next village and town were quite far away, so you supposed you could just rest here for a while without interacting with anyone, let alone some Alpha. You met some Alpha Kairagi before. That was really troubling.
The noon sunlight felt so harsh against your feverish skin. You recalled something that Thoma's boss, a man of high position you met in a passing, told you about, upon knowing you're an Omega; that you better be careful of his 'bro', an Alpha 'oni'.
Couldn't quite make up whether Kamisato Ayato was teasing you or not (he was smiling, but rather devilishly), you repeated the last word back to him. What was an oni?
... And you opened your eyes to one, for you were wondering how the sunlight was suddenly cooling.
"A..." you gaped at the youkai (?) in front of you.
(Wait, was oni youkai? They were not human, but not shapeshifting tanuki or kitsune either, right...?)
Whoever he was (you were pretty sure it was a he, but you might be wrong and you were ready to be corrected), he was massive, as in tall and muscular, with incredibly striking long, wild silver hair, pretty much shirtless, with two red horns on top of his head.
Your initial reaction was fear.
Your following reaction was horniness.
Well, you were in heat...
This oni seemed to realise that too, because he immediately slapped his right palm to his face, covering his nose and mouth, upon realising what was happening.
"I'm sorry!" he jumped back. "You looked unwell... and I thought I'd check... well... you smell really nice too, but... no! That's beside the point! Are you... are you... an Omega?"
You looked at him, feeling touched by his almost blinding kindness, and chuckled, "Yes. I'm sorry."
"Eh? What're you sorry for?"
"For wildly having a heat in the middle of Inazuma."
He looked positively perplexed. And cute. "Why are you apologising?"
"... For the inconvenience?"
"But you can't help it, can you?" he replied brightly. "You're born an Omega, just like I'm born an Alpha! You don't need to apologise for that!"
You like him already, with his booming voice and straightforwardness.
"... You're right. Thank you," you said. Well, more like panted.
"You're not okay..." the oni said dejectedly. "Is there anywhere I can take you so you can rest?" He was half-shouting because he was, wisely, distancing himself from you.
"I..." you were trying to think of any place you can go, like a safe room in an inn to spend your heat away. Or summoning a companion to help you with your heat.
(This big stranger was here, though. You partly wish he could help. You wondered whether he liked you as much as you liked him already.)
The next wave of heat hit you like another smack by a Lawachurl. You doubled down, groaned, and the oni came closer.
"Oh my gods! Are you okay? There's no Omega in the Arataki gang, so I don't know how... oh gods, oh gods," he was half-panicking for you and you kind of want to laugh.
(What's 'Arataki gang?' His crew?)
He knelt beside you, "Let's at least go to a more shaded area, you're sweating like crazy, ms..."
But he touched you lightly on the shoulder and everything kind of exploded.
You couldn't recall clearly how you got into this comfortable patch of grass underneath some trees or how it all started, but you were currently underneath him, having consented to his understandable reaction to your scent, pheromones, the whole thing. All you could think about was him, his dick, how hard and nice it felt inside you, and how you tried so hard not to moan your head off because it felt so good.
“I’m sorry, oh my gods, lady, I’m so sorry, I, ah, I can’t stop moving my hips!” the oni, on the other hand, was comfortable enough to being loud as he moan apologies while ramming you quite mercilessly.
You managed to laugh between your muffled moan, "W-why... why are you... ah! Apologising? It's okay, I..." you moaned again, him hitting you inside so good.
"Stop... clenching down so hard... on me... I'm gonna..." he grunted, very sexily you must admit.
"Ah... p-pull out! I also..." you reached for his chest, only managed to touch his abs (you didn't mind this, his torso was a work of art) because of how big he was, and it was relieving to see clarity behind his fiery eyes.
So he came all over your stomach and breasts while you were shuddering, coming underneath him, still very much turned on, and even more turned on upon realising that he came a lot.
Having calmed down, he embraced you again in his strong, muscular arms, his face in front of you and his forehead soon against yours.
"Round two?" he asked cheerfully.
You giggled, "Why do you make it sound like we're playing card game or battling onikabuto?"
"Oh, I'm very skilled at those!"
You grabbed his collar (?) and kissed him in the mouth, effectively shutting him up.
"Well," he cleared his throat, blushing, "Round two it is..."
And the switched was turned on once again, the sweet, childlike oni turned into a beast once more.