The Otaku in 10,000 B.C.

Plot

Ota it's a hopeless otaku, unlucky at love and with nothing going his way. His world is turned over when he's magically transported into a land that time forgot. Surrounded by nurturing, big breasted cavewomen with seductive banging bodies, Ota’s going to have his hands full teaching them a bunch of firsts in the history of sex!