The Case Where I, The Strongest Mercenary, was Reincarnated as a Bullied, Introverted High School Student – With My Unbeatable Fighting Skills, I Rule the School and Underworld

I Was the Strongest Mercenary, but Now I’ve Reincarnated as a High School Student Who’s Being Bullied. With My Mastery of Languages and Unparalleled Fighting Skills, I Dominate Both the School and the Criminal Underworld in ‘Reincarnated Mercenary’s Unmatched School Life · 最強の傭兵である俺がイジメられてる陰キャ高校生に転生した件～語学堪能で喧嘩も最強な俺は学園と裏社会で現代無双する――『転生傭兵の学園無双』