I Became The Strongest With The Failure Frame

Chapter 13: Serasu Ashren
Chapter 12: S-Ranked Hero
Chapter 14: Black Dragon Knights
Chapter 12: S-Ranked Hero
Chapter 14: Black Dragon Knights
During the school trip Touka and his classmates are summoned to another world. However, Touka was the only one with the lowest rank: E-rank — an extremely low status compared to his classmates. Thus, the former mob-character and abandoned hero, will absolutely become the strongest devil as he advances and strikes back.
Related Series