Soulmate au where shiro and keith dont have soulmarks (sheith,angst)
on earth 99.9% of all humans have soulmarks, keith and shiro are basically the only two that dont
Keith becouse his galra heritage prevents it, and shiro becouse his mate cant have one
they deal with it in very different ways
shiro deals with it by lying and saying he has one, but its in a very private place and hard to descrive
keith does by avoiding any soulmate and soulmark talk like the plaige
they love eachother but are convinced they cant be together since there “the one” will just one day come in and swoop them away from eachother, or in shiros case he’s convinced keith already found his soulmate and they died, since keith avoids soulmate talk like a man morning
shiro finds out keith might be his soulmate earlier then keith, after the trials of memora while he’s helping keith patch up
shiro has no time to tell keith that he also has no soulmark, becouse there are too many people around and too much to do immediatly and then shiro is lost, somewhere
a clone returns in shiro’s place, a clone with a soulmark in a unmentionable place who finds his soulmate while on the team
keith…doesnt deal well and trys desperatly to be on as many long, dangerous missions with the blade away from voltron(away from shiro and shiros mate)as long as possible, with cut communications
nobody really understands why keith is so upset everytime shiros lost, he acts like a soulmate whos mates indanger but there only good friends, its wierd to a lot of people
then, the clone is found out while keiths away, and flees with their mate, and real shiro returns
and is very, very stressed about keith being on a long mission away from everyone with no communications
and is more stressed when keith just, goes from one mission like this to the next imediatly without even a pit stop to the castle, and the third time, then the fourth, by the fifth shiros half convinced keiths dead and the blade are just trying to keep it from him and finally lets it slip when the team questions why it bothers him so uch that keith is probably his mate
and then team volton works to cut keith off before the next available mission, only for him to have been badly injured on the last mission and informed by a grim kolivan that keith didnt make it to the escape pod
cue shiro tearing the base kolivan said keith was at apart looking for him, eventually finally, Finally finding him barely alive in a cell and rescuing him
then keith recovering enough to hear the good news, that shiro could be keiths mate if keith wanted to be shiros mate
or bad ending where shiro finds keiths dead body floating out in space and freaks out, maybe pulls a zarkon for keith, maybe not, maybe clones keith so he can at least be around A keith, maybe not
however you like your sheith :)