The Otaku in 10,000 Bc, Volume 1 - Paperback

by Chousuke Nagashima (Author)

Unlucky at love and with nothing going his way, Ota's 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