The Otaku in 10000 B.C.

Ota is a hopeless otaku whose life is defined by misfortune, particularly in matters of romance. With nothing ever going his way and no prospects for love, his mundane existence takes an extraordinary turn when he is magically transported far from the modern world. Thrust into a prehistoric era that time itself forgot, Ota finds himself stranded in 10,000 B.C., facing a reality entirely unlike anything he has ever known. In this ancient landscape, Ota is surrounded by nurturing cavewomen possessing strikingly voluptuous figures and alluring physiques. As the first isekai release from creator Nagashima Chousuke, this nearly forgotten prehistoric tale follows Ota as he navigates his unexpected new environment. Far from his previous unlucky streak, he suddenly finds his hands full in this primitive world, tasked with introducing these women to a variety of unprecedented intimate experiences that will forever alter the history of human relations.