Moto Saikyou Tansakusha no Oji-san. Bishoujo Haishinsha wo Tasukete Oobazuri shiteshimatta

After being abruptly dismissed from his job, a middle-aged man finds himself at a crossroads with no clear path forward. Desperate to earn a living, he turns to the perilous world of dungeon exploration, taking up monster hunting as his new means of survival. Armed with years of experience and formidable skills, he ventures deep into the treacherous labyrinth, unaware that this desperate career change is about to alter his life entirely. During one of his expeditions, he crosses paths with a beautiful high school girl who broadcasts her dungeon runs live to an online audience. When danger strikes, he steps in to rescue her, inadvertently showcasing his extraordinary combat prowess on camera. Recognizing the sheer entertainment value of his abilities, the young streamer sees a golden opportunity to skyrocket her viewer count and eagerly proposes a partnership. Drawn together by circumstance and mutual benefit, the unlikely duo begins collaborating to produce increasingly thrilling and action-packed dungeon footage. As they delve deeper into the unknown, their broadcasts captivate audiences far beyond anything either of them anticipated, setting the stage for unforeseen consequences.