Bank tellers foolishly (or intentionally works too) remain in in the walk-in-safe after the bank closes and get locked in by the door's automatic closing and locking mechanism. Being Literotica this obviously leads to all of them having an all night naked orgy on top of the stored cash until the door opens on its own the next morning ...
But that would be "vault story."
Not to be confused with (1) "pole vault story" about all the members of the College's women's track team and a couple open minded and well-endowed guy's on the men's team. Depending on your mood it could happen the night before, and explain why the team does so poorly at away meets. (Even though everyone prefers the away meets).
Or it could happen afterward, perhaps even being "leaked" to a very pseudo-conservative college administration, perhaps at a very pseudo-religious school. Then the "bosses" have to choose which tine of Morton's fork they wish to be impaled upon.
The team members claim their stellar performance is motivated by a desire to prove themselves to their lovers. If true, then banning the celebration would be counterproductive. But the orgies violate the schools puritanical pseudo-values. The center tine is lying and covering it up while feigning ignorance.
Also not to be confused with (2) a 'Men without Hats' Fan Fiction, "Safety Dance Story."
We've probably all seen the image of Safe Sex, with two combo-locked safes getting it on. Extrapolate from that: a fellow with a prehensile penis inserts same into locks, keyed or combo, to turn the tumblers and open the vault.
And we may know about Safe Words, which hopefully extract one from erotic bondage. Again, a clever thief utters seductive phrases to persuade a Web-linked safe to open.
But a Safe Story? All of LIT's tales avoid snuff, bestiality, and underage, and thus are Safe Enough.
So switch back to Safe Sex, with two or more staff members stuck in a time-locked vault for the weekend -- luckily, it includes a restroom -- with nothing to do but fuck, possibly the motive of whoever locked them in the big safe. Was it an inside job?
Or a team of bank robbers find themselves inadvertently time-locked in the safe's vault. Who gets fucked to death? Who emerges Monday morning?
For the SciFi view, spies use a shrinking ray to make themselves small enough to break into an intel pro's little wall safe to extract secrets. Some miscalculation leaves them locked inside. Hilarity ensues, especially when the shrinkage expires and they expand whilst still inside. It'll get messy...