Sekai Saikyou no Kouei: Meikyuukoku no Shinjin Tansakusha

After falling asleep during a work outing, overworked associate Arihito Atobe dies when the transport he is riding in crashes and awakens in the Labyrinth Country, a world of reincarnated people. There, he is found by his demanding former boss, Kyouka Igarashi, who explains that newcomers choose a vocation and form parties to fight monsters in labyrinths. Kyouka, a Valkyrie, expects Arihito to join her, but he refuses because he knows how difficult she is to work for. As they part, she vows to make him regret his decision. Arihito’s new life begins as a “Back Guard.”