Okay so I sort of fell face-first into the Star Trek fandom and went on a Spirk fic reading spree. And, as is usual with my reading, I latched onto a plot that my brain is going nuts over.

There was a fic where Kirk found out he was like, 1/16th Vulcan because some industrious Vulcan lady a while ago decided the only logical way to experience Earth was to settle down and have kids there with a native and not tell anybody. Anyway, its very amusing, turns out Kirk is the last living descendent of some noble Vulcan house and as such can inherit quite a few profitable investments and a potential future High Council seat if he wants, though his taunts of assuming such a position to annoy Spock fall on the back burner when he suddenly goes into Pon Farr because of course he does.

But my brain immediately latched onto 'part-Vulcan Jim Kirk' and went a tiny bit rabid.

So the idea arrived. Kirk, completely unaware of his Vulcan ancestry, encounters Shenanigans on an Away Mission as is customary. Alien medical tech goes a bit bonkers and the captain is hit but physically okay, just unconscious. Bones will still give him hell when he wakes up but Spock can breathe easy. The Shenanigans were mild this time. Or were they? Turns out the medical tech actually did do something. It stimulated the latent Vulcan genes, artificially encouraging growth and change at an incredibly rapid pace, not eleminating Kirk's humanity but elevating him from Human with Vulcan spice, to almost even half n' half.

So we get poor Kirk waking up with undisciplined telepathic powers, a much stronger body, and the worst headache known to humanoids. Bones discovering his patient has miraculously decided to switch species overnight. And poor, poor Spock who just got over the minor heart attack of the previous incident and is now face to face with the prettiest Vulcan he has ever fucking seen.

Because half-Vulcan!Jim is blond, blue-eyed, and radiating 'confused kicked puppy' vibes like the world's most attractive telepathic foghorn.

Bonus points if Spock goes into Pon Farr early because Jim is projecting so much emotion and is also just That Pretty.