This happens in comics of Adventure Time season 11 where Finn Jake travel to Future – https/readcomiconline.li/Comic/Adventure-Time-Season-11/Issue-4?id=147997 and https/youtu.be/GKt7kIL5JDs

For how long have I been watching over my kingdom? A century or two? Perhaps thousand years... I don't know anymore, it's been hard to keep track of time... I'm lucky I guess to not forget my own name.

A vampire's curse like I thought, an endless existence as the world grows old and withers.

Even ocean's current changes directions, season cycles aren't as they were once.

For centuries I've learned many arts, gained many skills, studied texts and works for thousand of generations... Many of my old buddies, Finn, Jack... and yeah many are now dead and long gone.

It's sad and funny just how memory works, there are memories or parts you remember and ones you don't.

For example I have a throne at my castle here bit there us also another one beside it...

...I have no idea whose throne it was, but for some reason I just can't get rid of it...

My heart aches as I feel like If I will, I will regret it. I guess it belonged to someone like that.

Each time I get close to remembering, it slips away without a trace.

My memories aren't the only problem, there are also my dreams.

Lately for few months I've been seeing this small boy in them, a brown hair kid playing with some people I vaguely remember knowing.

I also see him coming to me.

He kept calling me 'mom' or 'mama marcy' while also hugging me. For some reason when I remember those dreams my eyes tear up.

I get really frustrated sometimes with all this stuff driving me crazy.

I don't wanna live like this for the rest of my life... or death...or eternity...

Guess my call for help were heard as some would say.

While I was working on some welding, I was met with a shining light in middle of my room, two people emerging from it. My two time traveling friends : Finn and Jake.

It felt great, so good that they were here... Including my uncle figure Simon.

That day was by far the most interesting day in a while, turns out that Bartholomew, Mingus and Orange Juice, the big sci fi toasters I made or thought I made, turned out to be dad's henchmen keeping my memories suppressed. If dad is asked, he'd say it's to "strengthen family bonds"

So my dad at fault again. Glob he's gone totally bonkers.

Finn, Jake, Simon, my past self and Bonnie came to help me out.

My Bonnie also came back , turns out she just off travelling for a little while.

I gave dad a piece of my mind too, my past selves then went back to their own time.

All in all it felt like the old days. Off on another adventure time.

If you thought my story was over... then not just yet.

The next few hours turned out to be just as strange while me and Bonnibel tried to clean up the mess left behind, with our BMO now fixed up and helping around their new home...

Some new portals began to appear, I thought annoyingly that it may be dad again... but this one didn't look or smell like dad's aura.

Strangely my head was feeling weird, perhaps the spell didn't fully leave yet...

Except I was not the only one, Bonnie too rubbed her tops like if her mind was rewritten...

BMO then started glitching... They said that new memories were uploaded in them.

New memories were going in our heads too, some were not the usual ones...

Bonnie then suggested that apparently the timeline's changing somewhere in the past...

Bonnie on the other hand did manage to remember something, this isn't the first time we've seen those portals, once a long time ago... they appeared shortly after the war with Golb, with a little baby boy.

With my memories now clearing, I could remember the boy we had, the boy we raised... In another different lifetime...

Imagine our shock when we found that very boy appearing from that portal, it was that boy. Our little Gregory.

He just stood there for a few moments confused, looking around where he was. We came up close to him, just to be sure.

He was looking at us strangely, for a moment I felt a bit odd, I wasn't sure how to feel about 'our son'.

BMO was first to approach, with Gregory picking them up and swirling around laughing before running up to me. He got into my hair then, crawling up to my shoulders chanting 'boo!'

He knew us strangely. He called us Mommy Bonnie and Mama Marcy.

I remembered him now, our time together.

Me and Bonnie immediately understood what's happening... an anomaly, this boy didn't belong to their timeline...

Well I guess that's to be expected, it already got pretty donked regardless...

For a moment I felt joy?... Grabbing and hugging him while somehow tearing up.

Bonnie patted his hair, having new sense of familiarity with him...

We were confused on what should we do with him... Should we adopt him? Again as weird as that sounds?

He didn't really get what was happening either, he couldn't yet talk though... make noises.

It felt really warm when he was still hugging against my neck...

It's been two days now.

And we had no idea what to do, I mean if that portal doesn't appear anymore, he's quite stuck here...

And I'm not gonna go and ask dad for help.

He's on time out for now. Plus I don't want him to possibly scare Gregory...

From what I remembered from new head info, Greg used to have some kind of trans human powers.

He could open random portals and go about anywhere around OOO, that's quite cool to have but pretty exhausting and it may get out of hand if he opens some unnecessary portal to some unwanted guests or worse... but to travel across time?

Now that just blows, what kind of kid did we have...

Anytime I asked that question, something stirred in me... I couldn't point out what that was yet...

For some reason, I really am happy that he's here though.

For whatever time we had all those years ago ... in another lifetime...

It feels like I loved every minute of it and now that I see him here, real and alive not just in memories...

On one hand this is wrong, I didn't know him... or I'm not supposed to, but I do now. And I'm responsible for him now, well me and Bonnie...

And he looked scared when I treat him like an unwanted guest...

So I decided that while we he's here, I wanted to see if I can recreate that bond we had in my memories

So I asked Bonnie that he can stay here for a little longer.

She reminded me that if he stays for too long than his past with us can just... erase and our memories of him may fade away with him.

He'll practically be a stranger in new world...

Remembering my own past, stranded in ghost town... ravaged by war and poverty...

Without mom and Simon, I'm not sure what would happen to me...

So I definitely am not supporting that option, I didn't want that and I knew it.

That's why I said "Just a little time"

She agreed and so we took turns on who will babysit him while the other will be working on the time machine. BMO helped too, apparently Gregory knew them enough to have fun together...

You know, I'm really glad that I have as much knowledge as Bonnibel.

Comes in handy, that we managed to keep track of time, we didn't waste any time.

I was the first, I took it upon myself to introduce my baby to the citizens, and castle staff... the guards liked him very quickly.

He was very playful with them too. When I went with him outside, he rolled over the round hills around the castle...

Seems like he didn't forget that game yet that I and Finn shown him.

He made good friends with candy Junior too, a candy boy living with his father Pa at the edge of the kingdom.

His father did make them search for plastic treasure, not that they didn't like to do that.

They did found some more old stuff, Junior and his dad asked if I could take 'em but I honestly think of his liking.

After that, we said bye to them and I flied him up into the sky, flying through the clouds carefully.

He was sitting on my shoulders through all that, hugging me as if it was him favourite toy. I felt really warm at that thought.

The next day Bonnie switched with me, she explained all the progress on the time machine, it's mechanics and necessary components.

I continued the research while Bonnie had her turn with Gregory.

She returned back very fresh and smilling.

But when that was over, Greg was put to bed and I saw her alone and sad on the balcony.

I talked to her and it turns out she's a little sad at the fact that they may never see Gregory after this again. She's telling herself that she'll be there with him but not as she is here...

I tried not to think too much on that myself, guess this would've come sooner or later.

And she was right, while with some powers of his own Gregory is overall a human.

He can't stay here and if we send him back, he'll just wither away... that line of thinking made me doubt if I want to curse my past self with that eventual pain...

But on the other hand, I feel like I'm kidnapping him... stealing him from her...

It felt horrible...

I now get how parent feels when their kid isn't around too much.

We went to his bed, watching him sleep and patting his hair.

Enjoying our time together... Time wasn't always on our side.

Few days went by as we slowly but surely found all we need for our machine to function properly.

Luckily for us Bonnie did had old time machine model from previous centuries just in case, she always tried to think ahead.

The time machine is a medium sized, red orange cylinder.

On one side is a small red button to activate it.

On the other side is two tube like silver wires. I middle is a gray display for four digits.

There is also a hidden counter that tells the number of times the time machine has been used. An improved version of the prototype Bonnie made a long time ago...

It wasn't easy for us, to say goodbye ...

Our bond deepened too as little time has gone on, which just made it harder...

...but for him, we had to let him live his life.

We led him all the way from his bed to our lab, we told him this is all a dream and that he'll wake up in his room soon. The timeline's already donked either way...

Once he stepped in, it was over. He was gone...

Guards didn't take too well as they were sad for a few hours, they really liked him. Bonnie and me were at the room he was sleeping in, and it wasn't without any tears.

Bonnie had her hands cover her face, I hated to see her like that. But while we're there I found few strands of Gregory's hair ... imagine my expression when i remembered something interesting. 'of course Goliad!'

I told Bonnibel that we may be able to create a child using Greg's genes in the hair strands. She didn't know if it'll work well but it's better than nothing.

I don't know if it would work out... if it will, then we have a second chance... Maybe...

BMO tried to comfrot me by saying that..

"Life at best is bittersweet..."

As I said, mountains crumble, seas rise and fall...

But an old friend and a new son reminded me, everything changes... but it still stays...

Even things that are not here with us anymore, we still remember them...

Even we may not ever meet again, in some part I'm happy that I had people that makes me struggle to say goodbye...

You may feel like this felt out of place and unusual being the 3rd pt, but let's just say my character Gregory isn't exactly a usual one. But I'll go into that eventually...

Now all in all much of my bubblineadoptive fics touch on different subjects like long lifespans, where mortals and immortals coexist and how each moment I precious even for an immortal one.

Got inspiration for this from both AT and this anime here - https/youtu.be/q1Ao5xOGMXY

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