How will someone who are used to living the ordinary life manage living in a post-apocalyptic world, and how will those from the post-apocalyptic world manage living in an ordinary world?

Hinata Shouyou has been a fledgling vampire for nearly all of this life, viewing humans as nothing more than livestock until seeing them for the first time. Wracked by confusion, he helps Kageyama Tobio escape the vampires' stronghold. Unfortunately for Shouyou, there are worse things than betraying vampires. ! Trigger warnings for gore, blood, self-harm, and ableistic language !