When the Enterprise responds to a distress call, thy discover a colony where everyone has died except for a Human/Vulcan infant who forms a child/parent bond with Kirk, to the chagrin of his bondmate, Spock
After the KM hearing and before the Vulcan SOS Spock seeks out Kirk to elucidate a few points. He expects a debate but finds more stimulation than he bargained for [cue movie]. What would've happened if Spock had not marooned Kirk on Delta Vega?
Spock and Kirk met young and promptly got bonded. Now they are at the Academy together but don't broadcast their relationship. Uhura, who thinks Kirk could never do monogamy, starts crushing hard on Professor Spock