Space Opera Chugaku

Nagai's ecchi parody of Star Wars with one of the leads being a genderbent barely covered parody of Luke Skywalker named Ryuko Skywalker. It's regarded as Nagai's second attempt at Shameless School and was very controversial with the Parent Teacher Association of Japan from the very first chapter. It includes much suggestive and violent content, leading to it only lasting a year in serialization. Most physical copies of the work are out of print, but can be acquired from sites such as ebookjapan with ease. The work debuted around the same time as Rumiko Takahashi's Urusei Yatsura.