Kirk and Spock both begin to have feelings for each other. They go to Bones for help, but realize that some things you can't learn from others; you have to experience them yourself.
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I have tried to be as canon-compliant to the original series as possible so here you go please enjoy my love letter to TOS
(P.S. sorry I'm terrible at summaries lol)
(P.P.S. if you're looking for smut you can pass right on by because this is nothing but pure, heart-achingly sweet fluff you have been warned)