The Phantom Panty

Kekko Kamen is about the misadventures of a student named Mayumi Takahashi who attends a boarding school called Toenail of Satan's Spartan Institute of Higher Education that is run by sexual predators. The teachers are constantly looking for ways to torture or humiliate the students, and from this the teachers derive sexual satisfaction. Takahashi's only protection is from a mysterious figure known as Kekko Kamen. Kekko Kamen herself is a mysterious figure who hides the face but not the body! She fights evil with nudity, and nunchucks. (Source: Wikipedia)

An alternative take on Mazinger Z, in the future, the world was destroyed by the demon know as Mazinger Z and the only human that is left on earth is Kouji Kabuto, he is given the chances to save humanity, by sending him back in time by a mysterious Minerva X, in this take the history is for adults, with nudity and blood that may be too much for some fans of the original version.