While on the road to their field trip, Class 2-C's bus is enveloped in light, and the Goddess, Vicius, summons the students and their teacher to another world. The Goddess hopes to raise them as Heroes to defeat the Great Demon Empire, and she welcomes the students after appraising their abilities with her crystal. However, Mimori Touka is appraised as an E-Class, the lowest rank... and he's branded a trash hero.
I'm a background character. 
No one's coming to my rescue.
‫أنا شخصية في الخلفية.
Einfach nur Luft.
Niemand wird mich retten kommen.
Soy un secundario.
Soy un secundario.
Je suis qu’un PNJ invisible.
Personne viendra me sauver.
Sono una mera comparsa.
Sou um coadjuvante.
А пустое место.