Failure Frame - I Became the Strongest and Annihilated Everything

A high school student who lived as a mob character - Mimori Touka. During the school trip, he and his classmates were summoned to another world. According to the summoning goddess, so many best ranked heroes like S and superior ranked ones like A was very unusual. Touka, however, was the only with the lowest rank: he was an E-rank hero, in the "failure frame" of the stepped pyramid frames. Hi status is overwhelming low when compared to his classmates. Moreover Touka's peculiar skill - Abnormal State Skill - looks like an absolute failure, so… Like this, the former mob character and abandoned hero will absolutely become the strongest devil as he advances and strikes back.