I Shall Be Happy

(Grisha's POV)

I failed... Now the power of the Attack Titan will be taken from me.

I'm sorry Eren(present), I couldn't help you with your dream. Please forgive me. Because of me, you have lost your opportunity to change the world. At least, please be safe and follow your dream.

And Zeke... I'm sorry for being a terrible dad. If there's a next life, I hope I can be better...

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Huh? I'm not dead?

[Grisha]

I turned my face toward the voice. It sounds very ominous but I couldn't feel any evil intention behind it. In fact, I feel like I heard that voice before.

"W-who are you? Where is this place."

[It's me, Athanatos. You have died but I managed to somehow contain you within this space, although only temporary. You will soon dissipate but I think these people know you so you should talk to them.]

He's Athanatos? The small boy that's always hanging around my son is... this thing? This is... unbelievable.

[You have 5 minutes. After that, these two guys will soon cease to exist. And so will their future. I can't have people keep interfering with my life. I hope you understand.]

I have to calm down... All of this is too sudden. I don't have much time left.

"Is that so... Then thank you, Athanatos-kun. Please help me take care of Eren."

Then, he slowly morphed into something else... It was the appearance that I'm always familiar with. This child...he looked the same as always, even in this situation. From first glance, it seemed like he is disinterested in any mortal affair. But, his actions are the complete opposite. No matter what, nothing can stop him from being happy. Maybe it's a combination of both being disinterest and wanting to be happy that compels him to act behind the scene. Regardless, it was the same innocent-looking Athanatos-kun as always, who is overly protective of his family.

I should have realized this sooner. The scene of a heavily mutilated body of a kidnapper flashed through my mind. The news that more than 20 Military Police disappeared overnight, right inside their headquarter, with evidence regarding their corruption scattered around. Then there's the death of 6 different crime syndicates leader... and among some other things.

It must have been him. No. I'm certain that it was him. Ever since he came to our life, things had changed for the better. If that is so, I can leave Eren safely to him... and maybe Carla too...

"Don't worry, Dr. Yeager. I will take care of him."

Then a few minutes later, I suddenly felt a small chill in my spine. Was my decision a mistake?

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(MC's POV)

While Dr. Yeager was talking to his two sons, which I found out after researching through this future Eren's memory. After reading all the important memories, I deleted all the irrelevant ones while keeping only some necessary facts. I don't want to have the memory of a different person other than myself, much less this f**king retarded Eren.

Speaking of which, this Eren... is a f**king BASTARD!!! I swear to god, after he finished speaking to Dr. Yeager, I'm gonna give him a good fking punch to the face. Maybe 2... maybe 3... more wouldn't hurt, right?

"Thank you for giving me the last opportunity to talk with my sons. Take care Athanatos-kun, I entrust the fate of the entire world to you."

Don't say that. You're making it sound like I'm a god or something... Maybe I am, but I'm not going to solve the world's problem. It can destroy itself for all I care. I just want to simply have fun. If the world can't afford that, then I won't even offer a single help... worse, if it does something to my family, I will unhesitantly destroy it. I swear I will.

"Hahaha..." I gave him a dry laugh, making sure that my message of not wanting to do anything is conveyed. "I don't know about helping the world. But I will certainly protect those I care for, and of course, Eren is my friend."

I gave him the best smile I could manage. I have been improving my own smile so it doesn't look like I'm a psychotic bastard. I think it went well.

"huh? Cough* I think that would be good enough for me. Goodbye Athanatos-kun."

"Goodbye now, Dr. Yeager. (゜▼゜＊"

Huh? What was that terrified face at the end? Was I that scary?

Well, nevermind. It's time to give this future Eren some good lesson about life. B.u.t.t before that.

Snap*

Zeke, and together with the so-called 'future', are now gone. There should be only the past and the present left. Nobody could now 'magically' time travel and come here, at least not from the future.

"Now Eren... I will need to have a good talk with you ( ´ ▽ ` )ﾉ"

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(After maybe like 20 minutes of beating Eren and 0.0000000000001 second have passed in real life)

"AHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHH! STOP! WHY ARE YOU DOING THIS!!"

"This punch is for Mikasa! This punch is also for Mikasa! This kick on your face is for Mikasa! And lastly,... this knee to your face is for you being a dumbass and for Mikasa.

"Please... Stop it..."

I think he's dying. I should stop now.

"Don't worry... you won't remember a single thing. (ノ・∀・)ノ"

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"Urgh... Why is my body so painful. What happened?"

It seemed like I didn't totally heal him. Welp.¯\_(ツ)_/¯

"It seemed it is a side effect of me stopping time. Here, let me heal you."

Of course, that is a lie. Hey, what is that funny face? You think I'm lying? Of course, I did, but I won't tell you that. What can you do? Bite me?

"To be honest. You might not know about me Eren, but I have been disappointed in your life."

Then his face scrunched up a little. It seemed he is aware of his mistake.

"I can't believe how bad you treated Mikasa. You are lucky that I didn't kill you myself."

"Huh? Mikasa? You mean you don't care about me destroying the world?"

(;￣Д￣💢 ）

"Quite frankly, I don't give a damn about what you did to the world. But what you did to Mikasa was unforgivable."

"She was just a dol-"

Before he finished speaking, I gave him a punch so strong, it disintegrated him completely.

He was going to say that Mikasa was a doll right? That was one of the memories that I chose to keep. Damn it! I should have tortured him for another 20 minutes or so. Too bad, I don't have a sadistic fetish.

It took me almost 15 minutes to access this special dimension but in the end, I accomplished it. I achieved more than I thought. I could now perfectly control this space and time domain within a radius of 20 meters, that's good enough for now. It takes roughly 1 second to construct this domain but I can improve later. I can now also freely teleport within that space so that's quite nice.

Now that I'm done checking my own space. I let time flow normally again. Right now, I'm still within the special domain, controlled by Ymir Fritz. This special space is the true secret behind the titans. Who would have thought that she's the person that's managing this entire dimension?

I take one last look at her. She had quite an expressionless face. Now, this is what you call a real doll.

"I will see you later Ymir. See you then."

I felt a small change within her emotion, but it still remain mostly the same.

Well, I don't really care. Maybe one day I will help her if I felt like it.

Without looking back, I exited this space and returned back to the real world.