Manga XXX Movie - Nikutai Ten`i 1

During the summer vacation from high school, an archaeological club member received a mystery vessel that had been used in a ceremony. When the light from the vessel shone on us, the other members of the club and I were blinded by our own consciences. When I regained consciousness, my conscience had been placed into the body of Kurahashi Yoshimi, whom I saw as my older sister and cherished. Her girl's body was extraordinarily soft, smelt wonderful, and quite responsive to sexual pleasure. It seemed unjust that the lady was such a stark contrast to the gentleman... The other members who were exposed to the light from the vessel experienced a mind-body exchange and were transported into the hidden realm of sexual yearning. The weird occurrences kept occurring again and over again. Were they going to be able to return to their own world?