#Obv his birth parents in the second idea have pink hair that's a requirement

[phoenixcatch7]

I want to write. A saiki k x superman crossover. SO BAD.

Luckily for me, I have actually seen both shows/media (to an extent), which feels increasingly rare these days lmao. I've got two ideas, and I don't know which one I like more. I will say this ended up being a LONG POST.

Either an accidental dimension cross, where saiki gets teleported to dc. He spends a couple hours figuring out what's going on, exploring his options and getting important lore via telepathy, but without being willing to mind control some hotel for a room or whatever he winds up people watching atop a skyscraper in some American city, just absorbing the concepts of public power use and heroes and aliens and all sorts. Reflecting on it's differences. That's when Clark decides to check in on this kid who hasn't moved for hours on patrol. Their heartbeat is calm, no stress, so he wasn't worried but he really should check.

Saiki, of course, has heard all about superman. What's available to the public, at least. An alien. He might feel better if he were an alien, at least then he'd know why. He doesn't really expect him to appear, but maybe he should have. Because it's only seconds after they greet each other and superman moves to sit down that saiki is hit with a plethora of background subconscious that's he's so used to himself. 'check your grip don't react move slower look away from the skeleton check your grip you didn't hear that relax your eyes you'll need to reapply bruise makeup after yesterday check your grip don't get distracted ignore ignore ignore-'

Ah. Maybe here. Here is someone who... Might understand.

I think they'd get on very well. Secret identities because you just want a normal life. Sometimes you can't help to help. You know a million private things you shouldn't and it's not your fault. No one ever shuts up even when they're silent and you're living in a world of cardboard. Superman would definitely check saiki was actually human XD. Maybe a bit of banter. Saiki gets to vent and talk and supes gets someone who isn't a blood relative lol. They talk until sundown and watch the shrimp colours and after Clark treats saiki to something sweet.

The other is a world fusion au, where saiki grows up alongside aliens and demons and maybe superheroes. Would it be better if he was the same gen as the jl or maybe younger?

What if saiki was kryptonian though. Some weird flavour. And his parents never think about it because baby saiki decided they were his parents and so they were. They just found a weird hunk of metal in the mountains on their honeymoon and little kusuke was so young he'd clean forgotten he had a new baby brother! He got over it though! So saiki grows up not knowing and eventually finds a cheap germanian ring, with a fake emerald in the center. It's blissfully silent, but wearing it too long makes him feel a bit nauseous. To be fair, blocking his own powers probably isn't very healthy. He heard there would be an eclipse tonight, over the ocean, and he wants to go see.

He's not alone. There's someone else there, also flying high above the ocean, hundreds of miles away from any land mass. His thoughts are - blurred, a bit faint, like a radio channel he's not properly tuned in to.

The other person, they noticed him too. They're miles apart, it shouldn't be possible. Another psychic?

I don't know which way it would go from there. If it was a same age, it'd be before everything hits the fan, narratively. Saiki and Clark would spend after school going to each others houses (though 80% of the time saiki would be the one going to Clark's) across continents, bonding and testing each others powers, getting into petty challenges. They both would be so good for each other, as equals, and saiki especially needs healthy friendships at that age. Then Mrs Kent mentions how Clark was found one night over dinner, blindsiding saiki because it just never came up in their everyday lives. Everyone assumes saiki was too, that he must be whatever Clark is, but he's not...?

And then they find the fortress of solitude. Meet jor el. And yeah, he very much is.

Psychic, yes. Human? Not so much. In fact, his parents were famous oracles who predicted the death of krypton to such an extent they were dismissed as fear mongers despite their powerful abilities. Jor had shared ship tech with them but never knew if they managed to use it.

Featuring several major identity crises for poor saiki and eventually a hero partner because Japan might be left mostly alone but metropolis sure isn't and unlike saiki supes can't duplicate himself (he's holding out for a yet but saiki just rolls his eyes at him when he says that). There's eight people who found the jl. Saiki REALLY likes mm. Batman is a traitor to normality.

If it were canon ages, there'd be a lot of mentor adoption. Saiki would appear helping to stop some alien invasion with his bare hands and then bows and tries to duck away. He isn't interested in hero stuff no siree but supes keeps politely tricking him into coming round to the farm, where he meets kids in similar situations (bcz supes adopts kon here f u) and sees how they handle it. Lots of tag teaming and attempts at pranking that all fail the saiki k way. There's so much else in the world they don't doubt saikis just Like That Psychic until he brings his ring. They all hone in immediately that 'that's kryptonite' and saiki maintains that it's the metal not the gem that muffled him until someone straight up steals the gem off the ring and he freezes in horror.

Lots of hijinks including 'you're supposed to be in school! Not JAPAN' and packs of overpowered teenagers roving the Japanese mountains looking for a possible krypton pod. Kusuke is feeling VERY VALIDATED RN and also incomprehensibly furious. It's a comedy of errors whenever any of them show up at saikis school or when he's with his friends. His parents remain oblivious while he grapples with either telling them he's adopted (painfully ironic), somehow undoing a decade and a half of mind control, how he'd even go about it... Makoto wakes up one night in Brazil because he made a comment in his house when kon was staying over for tea at saikis.