After Eren's battle with the entire military force, he had to lay low. He decided to try and clear his own name, as everyone thought that Eren's alter ego, Spider-Man had killed him.
Given his current circumstances, he couldn't fight crime anymore. With no other option than illegal fighting, Eren went at midnight to the new tournament, held underground.

(Eren's POV)

Without my Spider-Man identity, I could not fight crime but I could still participate in the fighting tournaments. I realized that I had no other choice and nothing to lose, I made my way to the tournament.

I was already deep in thought about what Mikasa told me. That I 'Killed Eren Yeager'. I killed myself. Was that a misunderstanding or was it a deliberate act to frame me?

She said blood was on my torn clothes, the same clothes that she last saw me wearing. Though I do remember correctly that I didn't injure myself that time when I took my clothes off, apart from a few knife wounds from fighting bad guys as a rookie, just before I arrived to the tournament, I was in a hurry to get to the tournament, but I was fully aware of what happened that day.

I took my clothes off, I webbed them to the wall, high enough that no one can reach them, and I swung away from the scene after I saved the day like usual. I remember though that I did not come back to retrieve my clothes as I forgot about them. It was only later that I remembered them when fighting Mikasa and her team of 'Elite Cadets'.

The thought of me being framed is bad enough, let alone for my own murder! That is worthy of being a crime in and of itself.

As I entered the fighting arena, I started to hear the people cheering already for me. I knew that since I was the guy who took down one of their best fighters. Honor and respect come from strength and winning in these places. It's the only thing I didn't like here.

I stared at my opponent, one of the usual tall, jacked muscles type of guys, ready to smack my head face first into the floor, or so they think. And as the match started, he charged straight at me, but I evaded him by jumping over him and doing a flip to get behind him.

"How do you do that?!" He asked, clearly shocked.

"Natural talent" I replied. "Also you should do something about that smell of yours. You smell of beer and... piss, probably, yeah definitely piss."

My words angered him as he charged again, straight at me while yelling a battle cry. I did the same thing as last time, evading him, only this time, I grabbed his head and we both went falling to the ground. I got up and kicked him in the chest as he tried to get back up. I started to kick the living hell out of him and listen as the crowd cheered on.

Since the arena we were in was caged, I pulled him up by force, punched him in the stomach and slammed his head face-first into the steel cage. I then started repeatedly slamming and slamming his head into the steel and listened to the crowd cheer on.

It was half a minute later that I realized what I've done. I immediately released my grip off my opponents head. But it was already too late. The damage as already been done.
I watched as he fell down to the ground, his face all red with blood. He was alive, but unconscious. I checked his pulse and made sure he's alive before I pinned him and won my first match. I immediately went back to my room and started thinking about what I did to the poor man.

I sat on a chair, sweating and breathing heavily. My mind was riddled with guilt for what I have done. I nearly killed a man. A man who was trying to win a tournament for a money prize. I nearly killed him. I swore an oath to myself never to kill again, and I nearly broke that oath.

As I was deep in thought, I heard a knock on my door. And before I could open the door myself, two girls, half-naked, one blonde and the other was red-haired, both invited themselves into my room and pushed me back to my seat.

"Hey there, tough guy." One of the girls said in a suggestive voice. "You impressed us so much in there."

She was obviously referring to the match where I nearly killed the man. I couldn't get that memory out of my head and those two girls weren't helping. They both sat on my lap and started to slowly caress my body seductively.

"I-I really need to go, now. So if you please let-" I was cut off by the other girl.

"Where do you need to go? The next match isn't about to start for half an hour. Also we want to help you relax and let you warm up before you go there." She said.

"Thanks, but I don't need your relaxation methods." I replied. But then another idea got to my head. "Well... if you can give me back massage, I'd appreciate it."

After a solid 30 minutes passed by, I left the two girls waiting in my room and headed for the arena.

"Make us proud, Love!" One of them said.
"Show 'em who's the real man!" The other said.

I Ignored them both and left, hoping that when I come back, they'll both be gone.
I decided for this next match, I shall not take it too far and just stick to tiring my opponent and pinning him when he cannot muster the strength to release himself. I did as I decided and one the match with no problem. I used some basic and advanced wrestling moves and made sure I didn't go too far. I took my mind off Mikasa and my own alleged murder and focused on the fight, which made it a lot more fun and entertaining for me personally.
I took my time trying to beat my opponent as it was so refreshing and made me happy and I took pleasure in winning the fight fair and square.

I returned later to my room to find that the two girls are still there, waiting for me. I sighed as I entered the room.

"Well done out there!" The blonde said.
"We watched you win and I'd be lying if seeing you win didn't make us do... naughty things to each other." The other girl said in a seductive voice.

"Well, uh... I'm glad that you had fun, but can you get out of my room?" I asked. "Please?"

They both laughed and walked towards me, as I was still standing and they started to circle my while moving their soft hands on my spandex suit.

"Mmm... nice suit." The Red-haired girl commented on my spider suit.

"Who made it?" The other asked.

"I did. Myself."

"Well, I'm more interested with what's under the suit..." the blonde replied.

"Mhm... me too." The other chick said, backing her friend up.

"Well!" I said, quickly sliding away from them two. "I don't think that's a good idea right now, so please, both of you, leave my room, right now." I said as pushed them out the door and locked myself in.

I breathed a sigh of relief, knowing that I am in my locker room, alone, with no one to bother me. I took a seat on the bench in my room and grabbed some water and drank. I drank all the water that I could drink and eased my thirst.

I headed to the arena later and fought my third match before coming back again to the room, no girls that time, and I sat down again on the same bench and decided to relax my full body.

I then decided to sleep for a few minutes until the time of the next fight. I closed my eyes and slowly began to drift away into the land of my own dreams.

I started to dream about me, being with Mikasa and Armin again, having fun, just like we did back when we were kids. Fighting bullies, fantasizing about the world beyond the walls, exploring that world and uncovering all the mysteries it hides from us.
But then, my moments of dreaming turned into a nightmare as I started seeing my mother again, being eaten by that titan with the evil grin on its face.

My body shot back up as I yelled "No!" To myself. I looked around and realized that I was in the locker room, 5 minutes for the match to start. I got my stuff ready and made my way to the arena.

I watched the crowd cheering on and singing my name.
"Spider-Man, Spider-Man! Does whatever a spider can!" I heard the crowd sing.
I entered the caged arena again, only this time, the only difference is that I felt like I was the prey inside the lion's den.
The man that came in was seven-feet tall, his muscles and veins sprouting out, his death stare reaches my soul and his hands looked like they can crush the bones in my body without any effort required.

It was good that no one can see my horrified face through my mask, but I was close to shitting my pants. I knew I could crush this guy, no problem, but his look intimidated and sacred the hell out of me. My heart was pounding, my soul was merely a few seconds away from leaving my body.
And then... the fighting bell rang...

He charged at me, his steps making the ground shake as he ran towards me and got closer and closer. I managed to evade him with a bit of luck. This guy didn't seem like he was going to give up easily.

The fight took one and a half hour out of my time. It was the most tedious, tiring and horrifying moment of my life.
And yet, even though the whole odds were stacked against me, I emerged victorious.

I exited the arena and headed back into my room to pack my stuff, get my money prize and leave.
And there, I found the two girls there, like last time, waiting for me. But this time it felt different. It felt as if they were longing for this moment for days.

"Oh my god, I thought you weren't gonna survive!" The blonde said.

I closed the door and entered the room.
"Why are you two still doing here?" I asked.

"Now. Do you remember what you did to us last time? You kicked us out of your room." The red haired said.

"That's rude" The other one commented. "And you need to apologize."

"And we've got just the right idea of how you can make up for it."

The last thing I said before being pulled by the two was: "Ugh! What did I get myself into..."