Ethan x Nico office au, it got a little long so it's going under the cut, cw for HR violations and unprofessional office behaviour
Ethan x Nico au where after his death it's determined that Ethan was too good for the fields of punishment but not good enough for Elysium and not neutral enough for Asphodel so he gets hired as an employee of the Underworld to work his way towards earning Elysium, which basically just amounts to being an admin-based office job. Nico is the boss' nepo baby son who Ethan is really irritated by but he's decent at his job so Ethan doesn't have much to complain about in regards to his competency. What he can complain about is his attitude. Nico struts around like he owns the place, and unlike Ethan, he didn't spend a year perfecting his customer service voice and professionalsona by walking on eggshells around a mad titan. What's worse is that Nico's pirate loving ass has a huge crush on Ethan, and unfortunately for Ethan, Nico is the guy who tried to flirt by taking his crush to hell, inadvertently getting said crush kidnapped by his dad, and taking his crush to go swim in the hellish evil death river that might kill you.
So Nico is constantly shoving his nose in Ethan's business, always trying to give unwarranted advice and making little comments on Ethan's work that make him see red. And he does it all while wearing the tightest office slacks available and bending necessarily far over Ethan's desk whenever he's trying to grab something. But Ethan is here to work so for a while he doesn't even register that Nico's flirting with him and just thinks it's annoying boss' kid shenanigans.
Eventually (and I mean eventually), Ethan takes the hint and the next time Nico is being a pest in his office and bending over his desk, Ethan graciously offers to help him find what he's looking for by coming up behind him, pressing his hips right up against Nico's ass and leaning over his back to grab something and then casually stepping away. Nico.exe has stopped working on the desk but now that he knows Ethan is at the stage of flirting back, it's full steam ahead babeyyyy. All at once he becomes ten times more annoying and ten times more slutty. He's showing up in full office-siren attire and leaning on Ethan's desk like he's got a spinal injury. Ethan recognises the game they're playing and slides back into his role of the uninterested office worker who's losing his patience with Nico's attitude, but he keeps giving Nico little scraps here and there just to tease him and get him chomping at the bit. Ethan puts his hand a little firmly on Nico's waist to move him out of the way on his way to the copier and Nico's brain gets fried for a quick second because he could feel the warmth of Ethan's hand through his thin white office shirt. One day while trying to rile Ethan up, Nico sits on his lap while Ethan's at his desk and then feels that Ethan is wearing a strap under his slacks, and while Nico is stunned, Ethan locks eyes with him in a way that gets him hard immediately.
They keep up their little push and pull routine for a while until Nico 'accidentally' drops something in front of Ethan while in his office. He drops it pretty close to where Ethan is sitting at his desk so when Nico bends over to pick it up (straight-legged, mind you) Ethan gets a face full of Nico's ass. And he can tell from how his tight-ass trousers are pressing against him that A) he isn't wearing underwear and B) he is wearing a buttplug. That's also when Ethan notices that the object Nico 'dropped' is rather phallic and likely used for personal things. By the time Nico stands back up, Ethan is out of his office chair and wastes no time grabbing Nico by the back of the neck and shoving him into the desk. He says that if Nico wants to act like a slut, shaking his ass and keeping his hole stuffed, he's going to be treated like one.
Nico is ecstatic when Ethan yanks his trousers down and smacks his ass for being such a walking HR violation. He toys with Nico's plug for a bit as he teases him and tells him off. He presses it in deeper to make Nico arch his back for him, and then roughly tugs it out. Ethan picks up the dildo from where Nico dropped it (again, but less intentionally) when Ethan grabbed him. Ethan notices the dildo is designed to be attached to a strap so he clicks his tongue and makes a comment about how desperate Nico must have been to get fucked by him. Nico, the forward-thinking professional that he is, is already fully prepped, hence the plug, so Ethan has nothing stopping him from grabbing a fistful of Nico's hair and shoving the toy as deep as it can reach in one quick motion. Ethan is still playing his role of the staunch professional so he starts fucking the dildo in and out of Nico's ass like it's a punishment. It's all "this is what you get" and "it's about time someone put you in your place" all the while Nico is drooling and moaning with his eyes rolling back in his head.
After this incident, the floodgates are unleashed. Their weird sex thing is a game to them and babey they just unlocked a whole new map. Nico likes being a tease/office siren distracting his straight-laced coworker with sexy temptations and being treated rough for it, and Ethan likes withholding sex from the guy trying very hard to seduce him until he's so desperate he's practically debasing himself and then Ethan likes the punishment part. The dynamic gives them both a lot of control and satisfies their need to feel desired, while also letting Nico indulge in his annoying brat tendencies and letting Ethan get a little S/M-y with his punishments.
Nico would absolutely try to get his hands on a magic strap that Ethan can feel so Nico can get Ethan to fuck him on the desk, legs wrapped around his waist so he can't leave, and hear Ethan's restraints groans and moans, or watch all the expressions pass over his face while he tries to keep control of himself. Ethan needs to have a "we shouldn't be doing this, this is unprofessional/you're so much younger than me/we're coworkers/ we have a weird power dynamic/ this is wrong" etc for it to be hot (they're both into it and both play it up). Nico being the boss' spoiled nepo baby comes in handy because all he has to do is bat his big baby cow eyelashes at Hades and they're allowed to fuck on company time. No one would look sideways at Nico sitting on Ethan's lap at a meeting while Ethan has his hand on Nico's ass, but they to try to keep it subtle mostly because it's hotter if they pretend they have to hide it. And Ethan likes threatening to send Nico to HR while his strap is so deep in his ass that Nico's asscheeks are pressed against Ethan's hips.
(part of me is tempted to fuse this with the lukethan office au. After Kronos implodes Ethan abandons ship and joins Hades' company where he fucks Nico on the desk while Luke sits under it, partiently waiting to clean up any mess they make with his tongue. Ethan got his job at Hades' company because he's a very competent worker with a stacked resume and a professional attitude. Luke got hired because he sucked dick in the interview. It also gives the Ethan x Nico an extra taboo side and up the sense of Ethan being a middle aged man with a wife and kids who really shouldn't be fucking the young sexy office siren. that part would just entirely be roleplay tho because Ethan can't really go "I can't believe I'm cheating on my wife with you :(" while his wife is kneeling under the desk waiting to lick up all the cum Ethan fucks out of Nico.)
