Atsushi’s smile doesn't leave Dazai’s brain for the entire day. He walks out of the agency, gets a taxi, gets out a few meters before his house and his mentee is still on his mind.
Dazai rings the bell and is greeted with Chuuya’s face. That immediately lightens his mood a bit.
“Hello Chibi~!” Dazai says with a smile and tries to grab Chuuya’s hat but the ginger man moves away. Dazai frowns in the joking way and puts his hand on his heart.
“How will I ever live comfortably if Chuuya’s hat isn't in my hand?” He asks and Chuuya rolls his eyes
“What do you want you stupid bandage waste?” Nakahara asks and that’s when Dazai gets serious. His eyes darken and Chuuya gets a sudden flashback from when they were both in the port mafia.
“What happened?” Chuuya asks, seriously too.
Dazai walks into the house and takes off his coat. He sits on the couch and takes Chuuya’s mug. The dog picture on it made Dazai laugh a bit. This cup was a present from him and he didn't know Chuuya kept it all this time.
“Shut up” Chuuya says with embarrassment. He takes the cup away and places it on the kitchen counter
Dazai’s laugh fades after a few moments and he looks at Chuuya.
“We need to spy on someone tomorrow” He tells his ex-partner amd Chuuya raises his eyebrow.
“Spy? Wait, we? Who do you want to spy on?”
“Atsushi. Or Akutagawa. Preferably both”
“I understand Akutagawa, he’s been acting weird these last few months but that weretiger? Why him?”
“I’m pretty sure he’s the reason Akutagawa’s not his usual normal” Dazai says and looks down at his hands. More specifically, his bandages on his wrists.
He remembers a similar smile to the one that appeared on Atsushi’s face. A smile like that often appeared on Mori’s face, right after he raped Dazai over and over again. He wasn't even a teenager back then…
He feared Atsushi had become what Dazai hated. But he needed to make sure he was right. There was always a tiny probability he was not correct.
Chuuya sits down, a bit shocked.
“Did he do a good or bad-”
“Bad thing. Very bad thing” Dazai answers before Chuuya can even finish his question.
Chuuga nods and there’s a grim expression on his face. Over the few years Dazaj had left the mafia, he and Akutagawa became very well acquainted. Sometimes he thought himself like an older sibling or some parent figure to Akutagawa.
That’s why the second he hears Dazai say that Atsushi did something bad to him, something worse than their usual fight, he starts to dislike Atsushi. Maybe even hate him, no matter how hard it is to picture that sunshine kid do someyhing bad.
“Okay. Let's find out what he did”
______________
They don't need any incredible disguises. They just don't wear their signature clothing and people suddenly stop recognizing them.
The person they decide to follow is Akutagawa. Chuuya had his location so it was very easy to find him.
“Look” Dazai says and Chuuya looks at the direction he’s pointing.
Akutagawa’s in his public clothing and has sunglasses on. He looks at the supermarcet and walks in. Dazai and Chuuya stand in frot of the shop, waiting for him to walk out.
He does. However, the second he looks to his left side his eyes get wide with fear and he quickly starts walking the ither direction. Dazai looks at what Akutagawa saw and frowns.
Atsushi was there.
“You saw it too, right? The look in his eyes” Chuuya whispers and Dazai nods.
“He’s following Akutagawa. Let’s go” Dazai says back and the dpuble black makessure to never let Atsushi nor Akutagawa out of their sight.
__________
A few hours later get on top of a roof, hiding behind walls. Atsushi’s finally close enough to Akutagawa to grab him and push him against the wall. The groceries fall out of the diablo’s hands and he punches Atsushi in the face.
The punch hits the cheek and Atsushi almost falls back. His tail saves him by holding onto a pole nearby.
“Why do you even still try? You know you wont win against me” He says and just to show it, he grabs Akutagawa’s neck. He squeezes it, not enough fo suffocate the diablo but enough to make it hard for him to breathe.
He puts a leg between Akutagawa’s and the diablo involuntarly lets out a quiet moan.
His face leans into Akutagawa’s shoulder and he smells Akyatgawa’s neck.
“You smell delicious~” He moans into Akutagawa’s ear and licks at the place he just smelled.
The black haired mafia executive gasps and later whimpers when teeth bite into his skin.
He was marking Akutagawa. Just like an alpha bites and marks his omega.
“You little piece of shit!” Chuuya yells at Atsushi but it’s Dazai who gets to him first. He grabs Atsushi’s hair and pulls him back so strongly that the white haired man hits the ground.
With hate in his eyes he watches Chuuya clean Akutagawa’s neck. The beautiful bite he made, almost gone.
Dazai looks Atsushi straight in the eyes.
“You’ve dissapointed me” He says.
Atsushi’s heart would’ve breaken at that. For some reason, it doesn’t though.
Akutagawa watches it all. How the old double black saves him. How Dazai changed back into the person he was a few years ago. Back when he was Akutagawa’s mentor.
How Dazai saved him yet again.
“Thank you…” He says softly to Dazai and then to Chuuya. The smaller man pats his head.
“Dont worry about it” He says and for the first time in a while, Akutagawa feels that there might still be hope left in his life.
_____________
Akutagawa isn't an omega in this story, but that's what Atsushi thinks because of the rut (or alpha) instincts that have kind of taken over his brain.
I hope you enjoyed reading this chapter
-Nat
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The (rut) cycle (shinsoukoku)
FanfikceAtsushi woke up hot and in sweat. Not sick but didn't feel entirely healthy either. He knew something was up with his body, especially since right after he saw Akutagawa he felt weirdly horny... Why is his brain not listening to him? And why should...
