Chuuya is Atsushi's dad and he's got it going on AU :)
One day, Atsushi brings his friends over from school, because the others live at the college dorms and thought it'd be nice to go back to a home for once.

They're surprised to find that their modest friend lives at one of Yokohama's most upscale penthouses, inhabited by only+
the richest of the rich. They had an idea that the first year had some money, hinted at by the fancy watch on his wrist and the designer brands he wears when they go out. But they didn't think he was /rich/ rich.

"Do you have a sugar daddy or something, Atsushi?"+
"Uh, no..? Just a regular one?"

He tells them to go ahead and make themselves at home, to which they all flop down on the leather sofa, sighing at the warmth and softness that comes with being able to afford /real/ leather.

"Sushi, is that you?" a voice calls from the hallway.+
"Yes!" the teen yells, standing up to greet the stunning man that walks into the living the room, fresh out of the shower, towel wrapped around his neck to capture the stray droplets of water from his still wet hair.

He's not wearing anything particularly eye-catching, just+
sweatpants and an old t-shirt, but /his face/.

Deep, azure eyes, fiery hair, pale skin, free of blemishes.

A literal Adonis, in the flesh.

Yosano is on the side, hands pressed together to pray that the man is Atsushi's older brother, while Dazai is blatantly staring.+
"Welcome home," the redhead greets, leaning up to kiss him on the forehead.

"Boyfriend," Kunikida whispers.

"Older brother," Yosano insists.

"Dad," Atsushi whines, cheeks flushing at being kissed in front of his friends, shocking them.

"Dilf," is muttered in unison.+
The man, who they now know is Atsushi's /dad/, waves off his embarrassment.

"Do you want me to make food? I think we still have salmon in the freezer."

But Atsushi is shaking his head, lightly pushing his dad out of the kitchen, telling him that he's got it handled.+
"You just got home from a business trip, right?" Atsushi grabs a water bottle from the fridge and shoves it in the other's hand, then proceeds to lead him back to the living room, where the attention follows the older man with every move.

"Go rest. I can take of my guests."+
Speaking of, the redhead does stop to bow to them, welcoming the college students into his home and thanking them for taking care of Atsushi.

"Our pleasure," Dazai smoothly replies, shamelessly giving him a once over when his head is bowed.

"Call me if you need anything,"+
he says to Atsushi, turning to give the guests a view of an ass that not even sweatpants can conceal, and retreating back to his room.

He pauses in his step, and the little devils, whose eyes never once leave his figure, are almost afraid that they've been caught in the act.+
"Sushi?"

"Yeah?"

"If your mom drops by," the words cause the hilariously hopeful faces of the semi-adults to drop, though they light up like Christmas trees at his next utterance of, "tell her to go fuck herself."

The similar thought of, 'Single!' rings in their heads,+
Atsushi sighs, a small smile adorning his face.

"How about I just give the witch's box of stuff to her and slam the door in her face?"

Are Atsushi's friends allowed to cry at the radiant smile on his dad's face?

"It would make me proud."

And then he's gone, leaving a group+
of horny college students in his wake, mourning the loss of the century's hottest dilf.

"Atsushi-kun," Dazai practically crawls to him, on his hands and knees, "why didn't you tell me your dad was so /hot/?"

"Dazai-san, please don't thirst over my dad."

"But /dilf./"+
It's not that Atsushi has a problem with his friends finding his dad hot or anything; he just doesn't want him to be reduced to a piece of meat for the lions to ravish.

The last person that did that ended up breaking his heart, abandoning their family for another man.+
Attempting to avert the attention away from his dad, Atsushi asks, "Who wants to play Smash?"

"I know someone I'd like to smash."

"Yosano-san..."

His friends aren't completely made up of pure hormones. They have hearts, too, and try to keep their thirst at bay, so that they+
can enjoy some quality time being buds.

It's all fun and games, 'til Dazai spams his fucking Villager rockets.

"That's cheating!"

"Sudden Death is Sudden Death, Kunikida-kun," the brunet taunts, smug about his fourth win in a row.

"Impressive."

Dazai jumps at the sudden+
voice behind him, turning to find Atsushi's dad observing their game play.

"I've never seen anyone use Villager as well as you," he elaborates.

Dazai overcomes his initial shock fast, aiming to keep his eyes on him.

"What can I say? I'm /very/ skilled with my hands."+
The redhead is amused, crossing his arms over his chest to show toned arms that slipped past their radar.

"Really?"

Dazai leans in a little closer, not at all as close as he wants, considering the backing of the sofa is in the way.

"Really, Nakajima-san."

Blue eyes widen+
then, as if he just remembered something.

"Ah, I don't go by /Nakajima/. That's my ex-wife's last name," he mentions with a grimace, as if the mere thought of the woman puts him off. This, however, interests the other occupants in the room.

"My name is Nakahara Chuuya."+
Dazai reaches out his hand, and, thinking it's going to be a normal handshake, Chuuya grabs it. What he doesn't expect, is for the brunet to boldly kiss the back of his hand, letting his lips linger a little longer than usual.

"Dazai Osamu, at your service, Nakahara-san."+
There's a muffled groan from Atsushi, who's lying face down on the carpeted floor, praying that it could open up and swallow him hole to avoid listening to his upperclassman try to woo his dad--not like /that/ would work on him anyway.

When Dazai looks up, hand still holding+
the other's, he's met with an extremely amused Chuuya, who doesn't let go either. Instead, to everyone's surprise, he laces their hands together, applying the lightest pressure as he tugs Dazai to stand up. And like the enamored man he is, he follows the motion, having to lean+
over the couch with some difficulty when he gets pulled even closer.

"Since you're so good with you hands," Chuuya begins, eyes mirthful as he mindlessly squeezes his hand, "why don't you help out with dinner?"

In the time it takes for Dazai to process the words that totally+
don't disappoint him, the warmth disappears completely, leaving him a gaping fool as he watches Chuuya saunter away, stifling his laughs behind the same hand he had kissed.

"Oh, thank God." Yosano lets out a deep breath. "I thought he was actually into it. I can still win."+
Meanwhile, Dazai is currently melting into the cushions, head swimming with thoughts of an addicting laugh and the fact that he managed to steal a kiss without getting slapped. On his hand or not, a kiss is a kiss, dammit!

"Atsushi-kun."

"Yeah?"

"Can I be your step-dad?"+
A pillow gets thrown in his face, one he admits, he does deserve, followed by a defeated sigh from the white-haired teen.

"Look, I don't mind you guys chasing after my dad, but if it's for superficial reasons, then please don't pursue him. He deserves better than that."+
"Don't worry, Atsushi-kun. I'll take good care of him."

The thumbs up that Dazai shows him elicits an involuntary laugh, breaking the serious atmosphere that had begun to form.

"Well, I doubt you can romance him anyway," he says, getting up at the call of his name.+
"Dad's gone through plenty of dates, since he and my mom separated. He always comes back home disappointed and huffy, grumbling about them never satisfying him, whatever that means."

Dazai, Yosano, and Kunikida give each other knowing looks, this itty bit of spicy information+
lighting the fire in two pairs of eyes. The blond is furiously shaking his head at them, but the mischievous duo are already making plans to bed the pretty dilf.

"Okay, so we lure him in with a good fuck, then make him stay for the romance."

Kunikida is grateful Atsushi isn't+
here to hear the dirty deeds being planned out, otherwise he's certain, they'd get banned from coming within 30 feet of his dad.

Worst case scenario: Dazai and Yosano get restraining orders placed on them, which wouldn't be shocking to anyone /at all./

Best case scenario: one+
of them gets to be Atsushi's new step-parent.

(Best for who exactly? Definitely not Atsushi.)

Either way, he just hopes that this infatuation that the duo is developing doesn't cause more harm than good, because they need to remember that Chuuya is Atsushi's dad. And if this+
causes a rift in their relationship, he /knows/ the older man won't hesitate to cut them off, for the sake of his happiness.

Chuuya is a grown adult. He knows what he wants, and if neither Dazai or Yosano can give it to him, they need to be prepared to accept a rejection.+
This whole thing is throwing Kunikida for a loop, but he supposes it'll be entertaining to watch his friends try and sweep Atsushi's dad off his feet.

Judging by the skilled dodging of the passes made at him during dinner, Chuuya's well aware of the attention and is merely+
ignoring the blatant flirting.

It'll be an arduous task for Dazai and Yosano, but maybe it'll turn out better than they expect, if the carefully placed touches and lingering stares from the playful redhead are anything to go by.

Oh, boy.

Let's see how this all unfolds.
/// and that's all for this AU! this was just a little snippet of something I MIGHT continue later, but because I have other things I need to work on, this is all I'm writing for the time being. I hope you stilled enjoyed!!! ///
Atsushi & Chuuya's ages, plus a tiny piece of backstory info https://twitter.com/ecchiuwusenpai/status/1325653512168992770?s=20
Chuuya & Dazai's ages https://twitter.com/ecchiuwusenpai/status/1325654203709095936?s=20
https://twitter.com/ecchiuwusenpai/status/1325655456316977152?s=20
You can follow @ecchiuwusenpai.
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