A high school student that has lived as a mob-character ―― Mimori Touka (三森灯河). 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.