It was no secret that the Wrath demon lord, Arahabaki, did not like the Sloth demon lord, Yozo Oba. Yeah, it pissed him off that the so called "black wraith" or "demon prodigy" rose up as the sloth demon lord at the age of twelve, taking his dad, the former sloth lord Mori's place like some sort of nepo-baby. Everyone always talks about his genius and power, but whatever! It's not like he's cares! As a wrath demon, he was far more powerful than stupid Yozo.
Still, Arahabaki became the Wrath lord at age sixteen, after his brother, Verlaine, stepped down and was recognized by King of Hell, Fukuchi, himself. Even after rising to the same rank as Yozo, he had never met Yozo, nor has he seen him. The snot nosed brat doesnt see a point in showing up to meetings with the King, Arahabaki assumes, though, he guesses it helps that Yozo is the step-son of the King. Having no reason to visit the Sloth ring, he's never seen Yozo, but he doesnt care. Screw that brat.
Now, Arahabki is twenty-five years old and living in the human realm as a human named Chuuya Nakahara with a human husband named Osamu Dazai. He's still a demon lord, unbeknownst to his husband, who doesnt even know he's a demon in general. He just.. leaves most things to his attendants and takes care of the important stuff - mainly meetings with the king. He's happy living his life as a human, and he's especially happy with his husband.
...Speaking of his husband. Unbeknownst to Chuuya, Osamu wasnt truthful either. He... well, his true identity is Yozo Oba, the Sloth lord. The difference between them, though? Dazai knows who Chuuya actually is. He just... well, hasn't said anything. He's done his research on all of the demon lords, so he knows all about Arahabaki and his hatred for Yozo. But he loves the man and has had the fattest crush on him since the name Arahabaki started becoming a hot topic in hell about a decade ago.
Well, his perfect life was crumbling apart fast. The lords have been summoned for a banquet and Yozo has been told that he has to attend. And Arahabaki will be there. Meaning he'll take one look at him and realize his husband is actually the man he hates. Knowing there was no way around this, he decided it would be revealed on his own terms.
To say Chuuya was shocked and slightly annoyed when he received an invitation from Yozo Oba himself to the Sloth Ring's Palace would be an understatement. He rejected it, only to receive another one... and then another one... and then another one. He caved, okay?
That's how he found himself in the Sloth Palace a day before the banquet, in full Arahabaki mode in his demon form. Being a wrath demon, he was part bull - so he had bull ears, tail, horns, and bull legs/hooves. Sighing, he followed the worker who led him through the palace and to a room, and after getting the go ahead, enters to find what seems to be a bedroom, looking soft and cozy with a plush bed in the middle, and on that bed looking at him? Yozo Oba.
Or, what should be Yozo Oba. Because this? This is the face of his husband, Osamu, except, well, sloth-ified. Being a sloth demon, he was part sheep. So he had fluffy sheep ears, tail, curly sheep horns, rectangular pupils, and of course, hooved sheep legs. Chuuya was speechless. There's no way. Yozo Oba couldn't possibly be-
"...Osamu?"