Synopsis: The Plain Salary Man Turned Out to Be a Hero: He Was Invincible, Only to Be Exposed on 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 Datta. ~Jikaku ga Nai mama Muso Shitetara, Mei no Dungeon Haishin de Sarasareteta yo desu~ / The Plain Salary Man Turned Out to Be a Hero / 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.