It's about a woman who seems to be able to travel through time and goes back to the middle ages in Europe, the Mayan/Aztecian time as well as the Roman ancient time and Nazi Germany.
I'm not sure if she's actually fighting against "Mephisto" and/or if she has a pact with him as a witch. Contains sex, torture and rape.

From the mind of Noboru Miyama comes Godo! An adventure set in a mysterious and weird world with influences from Norse mythology. "Put an end to this cursed world! That is your fate!". An alchemist by the name of Godo whose father was charged with theft must seek revenge for his father and his own freedom as he participates in the fighting festival known as Valhalla.

Dr. Yamagishi was expelled from an academic society because he had tried to make a human clone. Next theme of his study was a new human species Cambrian. He made himself a test target. However, he turned into a chunk of grotesque flesh, and it began to rape women by its tentacles.