A high school student that has lived as a mob-character, Mimori Touka. During the school trip Touka and his classmates are summoned to another world.According to the summoned goddess, summoning so many best ranks like S-rank and superior ranks like A-rank heroes like this is very unusual. However Touka was the only with the lowest rank, he was an E-rank hero. The status is overwhelming low when compared to his classmates. Moreover Touka’s peculiar skill is supposed to be an absolute failure 【Abnormal State Skill】and… Thus the former mob-character and abandoned hero, will absolutely become the strongest devil as he advances and strikes back.