Garbage Brave: Isekai ni Shoukan sare Suterareta Yuusha no Fukushuu Monogatari

Synopsis

While on a regular school day, Tsukuru along with his classmates got transported to another world. However, at the other side of the summoning there was a hero's auction, where each nation would bid for the heroes to defeat the demon kings of each territories. While his classmates received cheat jobs and got auctioned quickly Tsukuru got the useless job "Chef." As no nation bid for him, he got thrown out through a transfer gate. At the other side of the gate was a territory dominated by strong monsters... (Source: Hifumi Shobo, translated)