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.
Then you'll never be able 
to return to your world.
‫لن تعودوا إلى عالمكم حينها.
Ihr könnt nicht in eure
ursprüngliche Welt zurückkehren.
Nunca podrán volver a su mundo.
Nunca podréis volver a vuestro mundo.
Malheureusement,
vous ne pourrez pas rentrer chez vous.
Non potreste più tornare nel vostro mondo.
Vocês nunca mais poderão
voltar ao seu mundo.
То не сможете вернуться
назад в свой мир.