Dazai sat on the couch in the corner of the Armed Detective Agency. He was listening to music through a pair of headphones and bobbing his head slightly, presumably in time with whatever music he was listening to.

"Boo!" You cried out.

"Ah!- You're going to make me soil myself!" Dazai quickly turned up the volume of the music on his headphones and continued to pretend that you didn't exist. He's obviously trying to ignore you.

You grabbed the headphones by the side and yelled into his ear, "TIME TO GOOOO!"

He jumped up from the couch and flailed his arms like a madman. "I can't hear anything! What's going on?! What are you yelling about?! And why did you grab my headphones?!?"

You only sighed at him and turned around, what was he thinking, pairing the two of you up together?

You could hear the music turn down as he removed his headphones "Wait wait, wait! Don't go yet! What do you want? Come back! Where are you going?"

You turned around, telling him it was time to go meet up with a client. He groaned, letting out a sigh 

"Do I have to? It's such a chore having to deal with clients. They always have these ridiculous requests and demands."

You merely rolled your eyes at him and dragged him out. Once you reached your destination the both of you sat down across from a lady in white, tears streaming down her eyes.

Dazai was instantly uncomfortable, as he's not very good with people in emotional distress. He's also not very good at sympathizing with people. "Uh... Why are you crying?"

The lady seemed out of it, repeating a single phrase over and over. "I saw him, I saw-" Dazai's eyes softened and he pulled out a handkerchief, giving it to the lady. "Listen," his voice went smooth and full of care, totally not the Dazai that had sat next to you only seconds before.

Dazai placed a calm hand on her shoulder as she continued to speak, repeating the same words over and over again. He tilted his head slightly as his voice took on a more soothing tone "Tell me- who did you see?"

"The devil!" She screeched.

"The devil?" Dazai pulled back his hand and let out a small hum "The devil? The devil as in the devil himself? Or someone who looks like the devil? Can you be more specific?"

"It was the devil himself! Dressed in all black, a monster with fangs appearing from his back!" You stared at her intently, "Akutagawa..." You muttered.

Dazai quickly shot you a look, and you could tell from his expression that he was thinking the same thing "This description matches a certain person we know..."

After getting all you could from the lady, the two of you went to the crime scene where a bank had exploded. As you moved toward the crime scene, the woman's words continued to rattle through your mind. The devil... dressed in black... a monster with fangs appearing from his back. You couldn't deny the coincidence, the similarities between what the woman described and a certain man... Walking beside Dazai, who looked as fearless as ever, you felt accomplished and proud to be next to such a man. He turned to you with a playful grin and you couldn't help but smile back, it was almost infectious. 

Once you reached the crime scene, the entire area was cordoned off. Police officers were swarming the place, trying to make sense of what was going on. The bank had been virtually blown to smithereens in the blast.

Dazai kneeled down at the site of the blast. He started inspecting the crater, taking note of the fragments of debris that were spewed out from the blast. You watch as other detectives arrive on the scene, making their own observations based on the explosion. Some of them are discussing the nature of the explosion. Others are inspecting the rubble and debris for clues.

Just then the ground shook and the two of you looked behind only to see the one that caused this: Akutagawa. He smiled at Dazai before letting out a cough. "Well, well, if it isn't little Akutagawa~!" Dazai chirped. But you however were in no talking mood. Before Akutagawa could say anything you charged at the man, pointing a gun to his face. He dodged the attack and fired up his ability: Rashomon.

His Rashomon attack caught you off guard, and you didn't react quickly enough before your shot was deflected. Akutagawa smirked at you as he taunted you, and Dazai chuckled in the background. "Not bad, Akutagawa." he smirked.

"WHO'S SIDE ARE YOU ON, DAZAI!!" You yell at him.

 As you charged toward Akutagawa again, he countered your movements with ease, like an experienced fighter who can predict your every move like it's nothing at all.  

As the two of you fight him, you head into the bank to block his movements and get him away from the civilians. He follows you into the bank and you keep moving and shooting to no avail.

"Don't worry, Y/N!" Dazai called out with a dramatic flourish. "All I have to do is lay a finger on our little friend here and his abilities will vanish in an instant!"

But just as Dazai lunged forward, Rashomon suddenly darted forward with lightning speed. Dazai stumbles, barely dodging the creature's attack. "Whoa there!" he exclaims, regaining his balance. "Seems like someone doesn't want to be touched!"

Dazai grins, clearly enjoying the challenge presented by Akutagawa's slippery abilities. There would be no easy win here. If Dazai wants to nullify Akutagawa's powers, he'd have to get creative. The battle had only just begun!

You raced up the stairs as Akutagawa followed close behind, but suddenly the stairs ended and you found yourselves atop the towering bank, so high the police below looked like ants.

Akutagawa smashed you to the floor and you screamed in pain as a sharp sting went through your body. you shot and missed your enemy as you struggled to your feet. 

Just as Dazai was about to make a move he was flung high into the air by an attack meant for you. Both your eyes and Akutagawa's widened in an instant as Dazai plummeted to the ground at lightning speed, you could do nothing but watch as he got closer to the ground.

Akutagawa on the other hand gasped and leaped off the building in an attempt to save him. With his Rashomon he easily made it back to the top of the building, this time carrying Dazai in his arms. When he stepped back onto the solid ground Dazai quickly booped him on the nose, making his ability disappear as if it was never there.

The villain in black harshly dropped Dazai and left the building without so much as another word. Dazai merely laughed to himself and as you watched him go you couldn't help but feel overwhelmingly confused as to what just happened.

https://youtu.be/MoCaWpRAkVA