-manga Kyou Senshina Mob Mujikaku Ni Honpen Wo Hakai Suru Manga- ~upd~ Online

Kyou Senshina Mob, Mujikaku ni Honpen wo Hakai Suru is an ongoing dark fantasy isekai manga following Albert, a "mob" character who unintentionally disrupts the main story of a game-like world due to his overwhelming strength. Written by Narunoruna and illustrated by Satou Ryousuke, the series features the protagonist derailing the plot while attending the Radford Royal Institute of Martial Arts. For more details, visit MangaDex. Berserker Mob Destroys The Main Story Unknowingly

English Title: The Berserker NPC Unknowingly Destroys the World (Seven Seas Entertainment). Kyou Senshina Mob, Mujikaku ni Honpen wo Hakai

A plausible interpretation:
"A manga where an extremely strong, warrior-like, unaware mob character destroys the main story." Mobs in otome game worlds – The background

The Rise of the "Unaware Mob Destroys the Main Story" Manga – A Genre Explosion

Introduction: What Is This Genre?

If you’ve been following recent manga trends, you may have stumbled upon a strange but addictive premise: a background character (mob) who is overwhelmingly powerful but completely unaware of their strength—accidentally derailing the entire main plot. The keyword "-manga kyou senshina mob mujikaku ni honpen wo hakai suru manga-" captures this exact concept. In English: "A manga where a ridiculously strong, unaware mob character destroys the original story." No arrogance