Satoru Akahori pretty much defined ecchi in the 90s and early oughts with shows like Sorcerer Hunters, Maze, Mouse, Knights of Ramune, and Lime-iro Senkitan.
Here is yet another extreme ecchi manga by D.P (he’s also known for Trash. and Gun x Clover). Like his other manga, EVILIVE generally mixes shocking imagery with eroticism that hits every point on the spectrum.