Another Man?
Prompt: Can you write about the obey me brothers reacting to their girlfriend/boyfriend! MC simping over a mystery man only to find out that he was an anime character?
Gender: gn!Reader
Prologue:
You couldn’t take it anymore. How were you supposed to keep your mind and heart intact? Just when you thought he couldn’t get any hotter, your favorite anime character proved you wrong.
“I am already in love with you. How much more do you want me to fall for you?” A loud squeal escaped your lips before you shouted, “You are so sexy! I LOVE YOU.”

Satan was walking towards your room when he heard your words. Without giving it a second thought, he flung open your door, ripping it from the hinges.
“Who are you talking to?”
A fire surrounded Satan, almost like he jealously was manifesting visibly around him. You rapidly blinked a few times before calmly explaining about your anime crush.
“I see.” The Avatar of Wrath immediately calmed down, and within seconds, the two of you started laughing.
“(Y/n), do you smell something burning?”
A couple of minutes later, you and the demon brother stood outside, watching the House of Lamentation going up in flames.
“Who is responsible for this?” Lucifer asked as he rubbed his temples with his index finger and thumb. You nervously chuckled and explained.
“If I understand correctly…the air about Satan spontaneously combusted due to jealousy?”
You gave a firm nod, leaving Lucifer utterly speechless…and just when he thought his brothers couldn’t get any worse.

When you proclaimed your love for your anime crush, you completely forgot that Belphie was taking a nap in your room. As soon as he heard your statement, his eyes shot open.
Who do you love? Belphie’s mind began wandering to an imaginary world – a world in which he was using your crush as target practice. And what better to target practice than sharp knives. Yes, perfect.
Out of nowhere, you heard an evil laugh that nearly made you fall off the bed. Belphie stood in a corner with his hands held up to the heavens, a menacing glint sparkling in his eyes as he cackled away.

Mammon was in his room, examining his loot when he thought he heard you yell, “I love you”. He tossed aside the money in his hand and ran to your room with lightning-fast speeds, a trail of fire forming in his wake.
The demon kicked your door in half and gave a battle cry, thinking the man you confessed to was in your room. As soon as he saw your empty bedroom, his cry going for AAAAAA to an aaaaa–a–a…..
Mammon stood frozen in the middle of your room with his eyes fixed on you…who stood with your back glued to the wall, a terrified look plastered on your pale face.

Levi nearly dropped his game controller when you yelled. At first, he didn’t say anything and returned his attention to the game, but as time passed, he stole glances at you. Soon enough, the glances turned into glares.
The Avatar of Envy started sulking and sinking into his chair. It was only fair for you to fan, right? He fanned over Ruri-chan all the time, so it’s only fair that you get to simp over your favorite character. Right…?
Levi jumped onto his feet, stomped over to you, and tightly wrapped his arm around your waist. He shot a burning glare towards your phone screen and gritted his teeth, “They are mine! Mine! Mine!”

Lucifer was casually walking past your room when he heard you confessing to…wait, he couldn’t sense any of his brothers in your room. Does that mean there is a stranger with you? Moreover, did you just confess to that stranger?
He gripped the doorknob and flung open the door, slamming the chunk of wood into the wall behind it. An intimidating purple aura surrounded him as he asked in the lowest, coldest voice possible, “Who dare to enter my house and steal (y/n)’s attention?”
You shakily held up the image on your phone towards him, “I was ta-talking to my favorite anime character…”
Lucifer’s anger quickly fizzled out, and as he apologized to you, a loud thud echoed through your bedroom. The wall behind the door had crumbled onto the floor, leaving your room completely exposed.
“I…apologize…and shall have that fixed soon.”
This was by far one of the most embarrassing moments in his life. If only that wall had fallen on him.

Beel stopped eating and looked around the room. There was no one else around except him, so were you confessing to him? But then why were you staring at your phone?
“Um…who are you talking to?”
With a wide grin, you showed him your phone’s screen and introduced him to your favorite character before returning your attention to his photo. As you continued to scroll through fanart, you felt Beel’s gaze on your face.
Eventually, you looked at him and saw the Avatar of Gluttony staring at you with puppy eyes and a pout, “I…am hungry…”
“Want me to get you more food?”
Beel shook his head and mumbled, “Hungry for your attention.”

Asmo stopped in front of your door and covered his mouth. Were you confessing your love to one of his brothers? But he wanted to hear those words from you first.
He quietly opened the door and peaked inside but didn’t see anyone; instead, you were squealing at your phone. Maybe a picture of one of his brothers, or better, maybe you were fanning over one of his photos!
“And who are you staring at?”
You instantly ran up to him and showed Asmo the shirtless fanart. The Avatar of Lust gasped, “He may not be as good looking as me, but my, he is sexy. Tell me everything about him.”
For the rest of the day, both of your squeals echoed through the House of Lamentation. Much of the brothers’ dismay…