A few days had passed by and you haven't been feeling so hot. You felt tired and weak. You didn't know why, but you assumed that you simply had a common illness.

However it was starting to look like that wasn't the case. You were hardly in any condition to work and fight, or even walk around for that matter.

You were experiencing shortness of breath, your whole body trembling to an unhealthy amount, and concerning amounts of sweat.

You thought that it would get better if you rested, but it seemed that every second it was only getting worse.

Currently, you were laying in bed. Taking long and loud breaths as your chest felt heavy, and your body was starting to hurt.

Asia then walked in as she quickly came to your aid. Followed by all of your other girlfriends who had been granted the day off to take care of you here. Kirishima and Axol were also in the room, standing in the other side of the bed ready to help any way that they could.

Velvet: Do you think this is something you can heal...?

Asia: I-I don't know...he seems sick. My magic only works on injuries. But that won't stop me from trying!

Asia then gently placed her hands upon your body and started doing her thing. Your whole body being coated with a warm green light as you gritted your teeth and clenched your eyes shut.

Asia kept using her twilight healing for a total of 5 minutes but you weren't getting even the slightest bit better.

Asia: I-It's not working!

Kirishima: C'mon, Y/N! Fight! You're strong!

Axol: Kirishima's right! Keep going!

Y/N: !!!!!

You then started to grunt in pain as you held your head. A rush of unexplainable pain rushing through your head as your body started shaking even more.

Kirishima: I don't understand...he seemed perfectly fine yesterday!

All of a sudden the sound of alarms could be heard. This caught everyone's attention as the sudden loud sounds only fuelled your strange headache.

Several speakers from around the city could be heard as a handful of people in the room looked out the window. The sky was slowly changing colour and something massive was seen approaching the city in the distance.

Speakers: WARNING. WARNING. A Threat of an Unknown class is approaching the area. Initiate evacuation immediately!

Slowly but surely whatever was approaching the area came into view. It seemed to be a colossal serpent carrying multiple heads on it's body. One head alone was more than big enough to swallow one of the biggest buildings in the city with ease.

The Celestial Devourer

Weiss: What in the world is that...?!

Yang: Whatever it is, Lotus, Kasai, and Maquist can take care of it.

Y/N: N-No...

Everyone's attention then directed to you as you spoke for the first time since you got sick. You slowly tried to get up, but failed due to the pain.

Y/N: That's The Celestial Devourer...a mystical creature that only feeds on Celestial energy...it's safe to say it senses me...and I dare say it senses S/N too...

Yang: So what makes you think the others can't kill it...?!

Y/N: Many Celestials before me have tried and failed to destroy or contain it...some say it used to only have one head, but through several attempts of decapitation it simply grew more...it's even rumoured to be indestructible...that applies to even the Omni King...

Kirishima: You're kidding...!!

Y/N: I-I...*Cough*...I wish I was...but all we can do is hope that Lotus and the others can at least lure it away for now...

Meanwhile

Lotus, Kasai, and Maquist were doing everything in their power to bring this beast down, but nothing was working. Lotus' Gatekeeper Mode, Kasai's Shin Dragon Mode, and Maquist's Wukong 3 proved to be capable of doing damage, but none of them could put it down.

Kasai: Damn! It just keeps coming back for more...!!

Lotus: Where's Y/N?! We'd be able to have a better shot with all four of us here!

Maquist: We don't need Y/N to take it down! We're good enough on our own!

After even more attempts, they got the same result. The Celestial Devourer's adaption capabilities were too vast.

Kasai: We can't beat this thing as we are now. Being close to the city is keeping us from using our full power. We've gotta lure it away!

Lotus: That's the problem! This thing hasn't even tried to fight us. It's after something else. Whatever it is, it can't be good!

Back to You

Your illness was only getting worse as each moment passed by. Loudly grunting and barely breathing as Yang held your hand, not knowing what to do.

Yang: Hang in there, Y/N! You can do this!

You then started to sweat even more as your breaths became faster. The pressure and strain on your body was starting to overwhelm you not only physically but mentally as well.

However, you suddenly felt a devastating feeling flow through your whole body as you started screaming out of nowhere.

Y/N: GAAAAH!!!

Blake: What's happening now?!

Asia: My Magic's not working...!! I'm fact I think I'm making it worse...!!

???: It's simply because I'm getting closer...

Everybody gasped in union and turned around to see somebody at the door. Everybody going into defence mode. Even Axol, despite not having any way to defend himself or his friends.

Kirishima: Who are you?!

???: Who am I...? You really don't remember me, hm...? Well I certainly remember all of you...especially the red haired one...your academy was still in one piece when we met.

This statement caused Kirishima to think back. Back to when you first entered this reality and were still getting used to the new world.

The night where you all met Yakuza and Merno. There was someone else who showed up before Korizen appeared.

Kirishima: You're...!!!

???: Ah. Now you remember me. I am the Celestial Devil, MUSABORI.

It was apparent that this individual was their leader. Kirishima growing worried as your pain and screaming only for worse as he walked closer.

Eye-Catch

Eye-Catch

Yang suddenly aimed her gauntlets towards the man with a fiery look in her eyes as everybody else was prepared for a fight.

Yang: Don't you dare take even one more step!

Koneko: We're ready to fight you if we have to. So just go away!

Musabori: Me? Fight? Oh no...you've got it all wrong...I'm not going to fight you...or kill you.

Kirishima: What...?

Musabori: He is.

Musabori then snapped his fingers and grinned as your eyes widened greatly upon him doing so. You went completely silent as all of your current pain suddenly went away. You felt at ease...almost.

For a quick moment, almost unnoticeably, the shine in your eyes vanished. But it came back as quickly as it left as your vision suddenly went completely black.

Everybody was confused and nerve wracked by the Devil's current action. Slowly getting up from your bed using methods of movement that seemed unnatural and almost unhealthy for anybody.

Your face showed no clear emotion. Just slightly widened eyes with no shine in them, and a frown.

Meanwhile

Lotus and Kasai were currently on the ground exhausted. They had used up most of their energy against The Celestial Devourer, and Maquist was out cold.

Kasai: W-What just happened?! What did that thing do to Maquist...?!

Lotus: Did it...leech the energy from him...?

The Celestial Devourer then slowly but surely opened up it's many maws and started to inhale with incredible power. Lotus and Kasai felt as if their power had completely left their body as large orbs of energy bursted out from them.

The two orbs then flew into two of the many mouths of this massive beast as it gulped them down like gumdrops. Lotus and Kasai also losing consciousness as The Celestial Devourer let out a loud and terrifying roar.

At the same time, The Protagonist squad consisting of Midoriya, Issei, Ruby, and Akko all appeared right after Lotus, Kasai and Maquist fell unconscious.

Midoriya held Lotus in his arms as Issei picked up Maquist. Ruby picking up Kasai as they all looked at the horrible beast that was roaming in the city.

Ruby: What happened here...?!

Midoriya: I don't know. But whatever that thing is, we need to stop it now!

Akko: Are you kidding?! These guys couldn't even take it down! We should evacuate the rest of the people while it's not focused on us!

Issei: I'd say that too but it's headed right for Y/N's house!

Just as Issei mentioned your name, a large explosion of black energy occurred right where your house was. Lotte could be seen flying through the air leaving a trail of smoke behind as Akko went wide eyed and jumped to catch her.

Landing back on the ground, now with Lotte in her arms, Akko was quick to question her as she was nearly out cold.

Akko: Lotte! What happened to you!!

She couldn't say anything. Only point towards your house before she lost consciousness as well. Everybody looking towards your home as what they saw next, they could never see coming.

Y/N L/N (You) (Possessed)

Midoriya: Y/N...?! What did you do?!

Suddenly Musabori appeared by your side as The Celestial Devourer stopped in it's tracks. Everybody going dead silent as Musabori spoke.

Musabori: Looks like we've obtained the target. We shall regroup at the castle.

The Celestial Devourer then responded by leaping into the air and using Ki control to fly away as Midoriya could be seen charging towards you and Musabori

Midoriya: What have you done to our friend?!

The green haired hero leaped into the air while balling up a One for All powered fist. Ready to punch this guy right in the face.

However before he could even reach the Devil, you appeared in between the two of them and caught Midoriya's fist with ease.

Midoriya: Y/N, Don't do this! You're stronger than this!

Y/N: Shut up and die for me.

Midoriya went wide eyed by your choice of words as he was suddenly knocked into the dirt with a singular kick to the chin.

Midoriya went rolling across the ground and eventually crashed into Issei as Musabori looked up at the sky and then to you.

Musabori: The process has begun. Y/N, you will come with me. I have a job for you.

Y/N: Yes.

With that both of you flew off as nobody could do anything to stop you as their hands were already full.  Midoriya slowly getting up from the ground and reaching out as he called out to you.

Midoriya: Y-Y/N...!!!

Issei: We have to go after them!!

Ruby: We can't. We don't know where they've gone or how far they went. Besides...

Ruby then looked at all of the destruction that had been left behind from this mastermind of a Devil. All of your girlfriends were on the ground, S/N could be heard crying in the distance, the three strongest individuals next to you where all down, and the city had taken a considerable amount of damage.

Ruby: I think we need to help ourselves first...