TL;DR: basically soft arranged marriage in modern setting: lasting coupling formed by initial outside nuddge/pressure.
By more or less relentless activity of a third party, preferably one or more depraved or confused women, for whatever reason thinking it could be a good deed and generally with good intentions, two otherwise initially passive towards that goal people find themselves together in potentially sexual situation(s), decide to go for it and become a more or less lasting couple.
+ bonus if both are unaware of the initial manipulation, the later in the story that angle is revealed the better
+ bonus if the pairing may seem or be deemed unlikely (freely including the expected cliches)
+ bonus if one or both are clumsy virgins unsure what to do but feeling compelled to perform, perhaps worrying about a possible judgement not only by partner but by the interested third party as well
+ bonus if the woman making the arrangement is older and/or in position of power relative to one or both of our "accidental newlyweds"
+ bonus if the situation arises out of confusion or misunderstanding, the inciting parties motivation and actions are innocent but missinterpreted or lead to unintentional consequences, generally comedy of errors
+ bonus if there's lots of gratuitous supposedly shy and secret but voyeured on nudity, ideally outdoors, even more so if the main couple met nude outdoors in supposedly non-nudist setting in early stages of their relationship
None of those are requirements, likewise there are no hard squicks at all, however:
- blackmail or violence is unwelcome, nudging is preferred to coercion, the end situation hopefully be in general better than the start for most parties, especially the main couple
- humiliation is unwelcome, but can be easily tolerated, while it shouldn't be the main theme for any length it can be a driver of the inciting person's initial motivation, although then ideally should backfire
- excessive bdsm elements or lifestyles are unwelcome, some elements or fleeting glimpses may be tolerated, especially if only background characters are involved in those
- grooming for prostitution or otherwise exploitation, enslavement, "slut training," bimbofication and similar, likewise are unwelcome, but can be tolerated as danger element or complication if that particular plot ultimately fails, is overcome or backfires, but not as the main driver/goal/result
- late additions to massive preexisting harems also do not apply, perhaps unless this exact angle is indeed main driving the plot and serve as source of major drama for extensive portions of the whole story, however, if the events eventually lead to moderately open relationship or occasional swinging, a stable threesome or happen in very early stages of harem building, that's not a problem at all
- incest as main theme between the main couple is not ideal either, but flirt with incest or near elements, in the background or as possible alternative or additional outcome, even as inciting parties ultimate goal that fails or even partially/temporary succeeds is not a problem.
Possible plot examples may include, be generaly vaguely similar, but in no way limited to:
> a sister, probably out of suppressed desire/jealousy convince everyone and especially their respective mothers that her terminally shy bff and dweeb brother are secretly lovers contrary to any evidence; one or both of said mothers and possibly eventually the whole of their social village, for likely a wide variety of reasons decide the alleged relationship welcome or advantageous before it even exists in reality, making sister's worries ultimately self-fulfilling prophecy; she may contribute herself trying to test her theory and cath the sneaky couple in the act, actively engineering situations for them, until ultimately, one of the mothers just assume it's time for them to end sneaking around and share a bed officially (possibly leading to both of them losing virginity that night).
> a high school queen bee cheerleader decides to punish and humiliate a prim and proper future valedictorian she has a unbearable crush on and a dweeb nerd who tries to follow her like a lost puppy by making them to have sex in public with each other; it's hard work but she succeeds, only to find herself being secretly a bitch to what is now school's most celebrated couple.
> an educator, possibly reading essays, decide two students are in secret mutual love with no way/ability to express it or otherwise be an ideal couple, and decide to help along; she succeeds to the surprise of everyone but mostly the two targets.
> as part of school social work program, two students, far less than favorited by each other, are sent to help a problematic very old woman living lone in a derelict mansion (that combination of choices being possibly at part intended as punitive towards one or both by the teacher in charge); through a string of improbable events and accidents the possibly crazy witch gets to direct them having sex; out of fear to reveal what happened and/or the educator in charge generally, students give favorite after action reviews and this becomes a regular arrangement; eventually they inherit the mansion on conditions that they promise to marry and move in asap, likely turning it into a focal point of mass depravity of their peers.
> two naughty grandmas drinking wine decide their respective teenage grandkids ought to be a good party, had they chance to learn to know each other (biblical sense including), and see it happen despite limited and mostly passive/inertial resistance of their direct parents and the target teens themselves.
There can be countless other emanations of how what I'm searching for could manifest, although the very thing can be rather specific and hard to define in the nuance (thus the lengths of descriptions), I can't believe there is nothing at all alike out there.
This is my second if not third try at soliciting recommendations here, the previous left with no reactions, possibly being too narrowly or creepily described?
Or should this be moved to Story Ideas instead?