any sans x nightmare headcanons????
ok so bear with me here im about to plot dump instead of headcanon but ill put headcanons of my own in i promise- for example, the entirety of nightmare's character
nightmare only visits the classic timeline three times before hes absolutely smitten with classic: the story
the first time was out of curiosity, when he was around 100 years old, because, c'mon, THE classic timeline? he wanted to see for himself what it was like - so he visits a timeline, picks a point in that timeline, and whoosh
he hasn't met killer, cross, dust, horror, or error yet, hes mostly just been on his own after the apple incident happened. and what ends up happening is he finds classic - or rather, classic finds him as hes wandering around the timeline
classic sneaks up on him, like how he does to frisk in the game - and nightmare, 100 years old, impulsive, and its definitely not because classic scared him, turns around and attacks
one of my hcs: classic is the best sans at dodging - which means he can easily dodge nightmares attacks
nightmare attacks, classic dodges, nightmare stops bc he sees classic and hes like "oh shit, a sans"
classic is totally chill as he starts talking to nightmare (asking who he is, buddy, and where he's from, "dont think ive seen you around before") but nightmare can sense how tense he is, and then points it out like a dumbass ("you feel awfully apprehensive for someone with such a clear calm look on his face. wonder how you got so good at hiding your emotions")
classic shrugs and just "you get a feel for it when everything keeps happening over and over again" except he totally jokes about it with this dumb grin and probably slips a pun in there too but i cant do that bc im absolute shit at puns
anyways nightmare digs a little deeper into classics feelings and he has to step back a little bit bc 'yo what' - classic feels something close to... admiration for him, towards him
nightmare squints and asks "have we met?"
and classic grins "i think we have."
bigger squint from nightmare "i havent met you."
and classic nods "you haven't met me before, but you're meeting me now."
but he ends up hanging around the timeline because classic is kinda very much really interesting - and classic treats nightmare as though he weren't a pseudo-god of negativity
classic is so nonchalant and even almost friendly towards him, which is something hes never really had before, so of course he wants to stay and drink in that feeling, but while he stays, he starts getting to know classic
and all the while, even when he gets upset or angry or snaps at classic over the smallest things, classic just smiles at him, that little persistent buzz of admiration or something still underneath that carefree smile
nightmare leaves one day, not rlly able to understand the feeling classics got, so he leaves to clear his head and just think about how classic feels about him, and what's even going on there (fellas, is it gay to analyze the innermost thoughts and feelings of your best(?) friend(???) nightmare doesnt even know)
so he tries to go back to the timeline, but he picks the wrong time, drawn in accidentally by negative energy now that he's actively thinking about emotional stuff - and he ends up standing behind a much younger classic, who just witnessed gaster fall into the core
this is classics first time meeting nightmare, but its nightmares second time meeting classic (this is also the second time hes entered this classic's timeline) - everyone keeping up?
so anyways nightmares tempted to just leave, but past classic has all those delicious negative emotions, so he ultimately has no choice but to stay and hang out with this (to him) younger (by not very much) version of classic
hes used to being around classic so past classic is of course, intrigued by how well nightmare knows his shticks, his favorites, and how nightmare even successfully puns back and forth with him and wins
nightmare accidentally succeeds in being a pillar of support for past classic and helps him through his grieving process (bc gaster got YOTE into the void man)
anyways after this, nightmare ends up saying goodbye to past classic and leaving again, bc as nice as this was, hes so fucking confused about how he feels about classic in general and things are all confusing still
and when he comes back (his third visit), he comes back at the correct point this time - not the first point, but just after the second point
so nightmare kinda awkwardly talks to classic about his Feelings tm and how he originally met an older version of him later on in this timeline and all this fun timeline junk
and classic just takes this all in stride like "ok if it already happened in the timeline and you remember it, its fine if you tell me bc time works weird man"
anyways theyre not quite to the level i want them to be at yet BUT ill get them there bc
eventually time does move forward
and nightmare leaves and comes back after a while, to a classic who just had past nightmare meet him for the first time
and this is when nightmare lowkey confesses gay feelings for classic and they snuggle together maybe
and maybe just maybe they smooch a tinie lil bit