The world is against you... the only goal is to survive. Along with five others, you have to somehow get across the sea and away from an island infested with the undead. The objective seems nearly impossible, but a certain other girl walks through the hell by your side, and helps you hold on to hope... or at least, make your last week on earth as memorable as possible. (temporarily on hold) ymir x female!reader [apocalyptic AU] -- THIS FIC IS ALSO POSTED ON MY AO3, @krstein - mature contents!