Spock realizes that he is unable to find his usual equilibrium and so he asks to take shore leave with unforeseen consequences. Set against the back drop of a visit to the shore leave planet there is the usual mayhem you would imagine when humans and Vulcans think they know what they want...

Spock is away from the Enterprise, and Kirk believes Spock has found a lover that might lead him away permanently.  Kirk is forced to re-evaluate his feelings about his First Officer.

A slashy take on the TOS episode "The Conscience of a King".

How do Kirk and Spock, still early in their physical relationship, deal with situations which inevitably raise that most dangerous of emotions, jealousy. Can Spock trust his lover where beautiful women are involved and how will he deal with the fall out from this testing experience. I have always thought the dynamic between Kirk and Spock cleverly changes in each part of the episode. There is a lot unsaid. Perhaps this is the explanation.

After the dramatic events on Ekos Kirk reflects on the nature of his sexuality and wonders if Spock will be able to deal with some of his more perverse pleasures. Spock as it turns out has a few surprises up his sleeve. This is a stand alone story but it does follow on from Once more with feeling.

Spock has claimed his beloved Captain as his lover, so now comes the morning after. Can the second time match up to the first? A joyous sequel to Return to Tomorrow 

Following the mission in which Kirk, Spock and McCoy became the playthings of Plato's stepchildren, the crew beam back on board the Enterprise.  It appears, however, that the vengeful Parmen has one last trick up his sleeve.