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

Story:

One typical school day, Tsukuru and his classmates got transported to another world. On the other side of the summoning, there was a hero's auction, where each nation bid to take home the heroes to defeat the demon kings of each territory. While his classmates received cheat jobs and got auctioned off quickly, Tsukuru got the useless job, "Chef." After no nation bid for him, he got thrown out through a transfer gate. On the other side of the gate was a territory dominated by strong monsters... As he manages to survive the monsters' attacks while nearly dying, Tsukuru starts on the path of becoming the strongest!