“DxD: Freed Sellzen?”

"Goddammit, I'm a short crazy villain in a cheap Tig Ol' Bitties harem anime?!" He didn't ask to be reborn as a pint-sized villain. He definitely didn't ask for the goofy plot. But now that he is here, he is going to cause total chaos. Watch the ultimate underdog villain take on the ultimate lucky hero. — Description from novelcodex.org