An Unaware Old Man Becomes an Overpowered Streamer Jimi na Ojisan, Jitsu wa Eiyu Datta. ~Jikaku ga Nai mama Muso Shitetara, Mei no Dungeon Haishin de Sarasareteta yo desu~

También conocida como: An Unaware Old Man Becomes an Overpowered StreamerKeita Sato, a 41-year-old single office worker, spends his days handling stress and tedious work tasks. His unique way of unwinding involves diving solo into modern-day dungeons and using ferocious monsters as batting practice! One day, his niece Hikari secretly follows him and ends up streaming his dungeon exploits...!!, and it seems he was exposed in his niece's dungeon stream, Jimi na Ojisan, Jitsu wa Eiyu Datta. ~Jikaku ga Nai mama Muso Shitetara, Mei no Dungeon Haishin de Sarasareteta yo desu~, Jimina Ojisan, Jitsu wa Eiyū Deshita. ~Jikaku ga nai Mama Musō Shitetara, Mei no Dungeon Haishin de Sarasareteta Yō Desu~, The Plain Salary Man Turned Out to Be a Hero: He Was Invincible, Only to Be Exposed on His Niece's Dungeon Stream, The plain uncle was actually a hero. He was unconsciously invincible, The Plain Uncle Was Actually a Hero. He Was Unconsciously Invincible, and It Seems He Was Exposed in His Niece's Dungeon Stream, The Plain Uncle was Actually a Hero. He was Unconsciously Invincible, and It Seems He was Exposed in His Niece's Dungeon Stream., 地味なおじさん、実は英雄でした。～自覚がないまま無双してたら、姪のダンジョン配信で晒されてたようです～ · Jimi na Ojisan, Jitsu wa Eiyu deshita.: Jikaku ga Nai Mama Muso Shitetara, Mei no Dungeon Haishin de Sarasareteta You desu · Jimi na Ojisan, Jitsu wa Eiyu deshita. - Jikaku ga Nai Mama Muso Shitetara, Mei no Dungeon Haishin de Sarasareteta You desu · The Plain Salary Man Turned Out to Be a Hero: He Was Invincible, Only to Be Exposed on His Niece's Dungeon Stream · The Plain Uncle Was Actually a Hero. He Was Unconsciously Invincible, and It Seems He Was Exposed in His Niece's Dungeon Stream · 不起眼的大叔。其實是英雄。~毫無自覺中已然無敵，似乎在侄女的迷宮直播中被曝光了~ · 地味なおじさん、実は英雄でした。　～自覚がないまま無双してたら、姪のダンジョン配信で晒されてたようです～ · The Plain Salary Man Turned Out to Be a Hero: He Was Invincible, Only to Be Exposed on His Niece’s Dungeon Stream · Jimi na Ojisan, Jitsu wa Eiyu Datta. ~Jikaku ga Nai mama Muso Shitetara, Mei no Dungeon Haishin de Sarasareteta yo desu~

Keita Sato (41, single) is overworked at his corporate job, dealing with tedious and stressful tasks day in and out. How does he relieve his stress? By sneaking into modern-day "dungeons," using them as a batting cage, and blasting away ferocious monsters! One day, his live-in niece Hikari secretly follows him and livestreams his adventures, only for his unbelievable strength to go crazy viral!! Keita unknowingly captures the attention of not only viewers, but other big-name streamers. So begins the fantasy tale of an ordinary office worker's unwitting rise to fame and glory!