In the year 2040, humanity developed a machine that could travel back in time. "So, what do we do with the machine?" "We must take a glimpse into the (lewd) pages of history when sexual culture flourished the most!" ...They said with extraordinary ambition. Established by some pervert who screwed up--- I mean, a group of researchers, the Global Sexual Culture Research Institute pan-human research begins now! Next Chapter (Next Issue):Global Sexual Culture Research Institute Chapter 16Global Sexual Culture Research Institute Chapter 17Global Sexual Culture Research Institute Chapter 18