The Genius Swordmaster Returns
Kaettekita Tensai Kensei: Maryoku Zero no Ochikobore na no ni Jitsu wa Saikyou
Action ยท Fantasy
A century ago, Agito Yatsurugi and his comrades saved humanity by slaying the six dragons that invaded Earth through magical gates. As he lay dying, he learned the dragons would return in 100 years to awaken the dragon… Synopsis via AniList
Ask Tsundoku about it Manga like The Genius Swordmaster Returns