Saved from a dreary existence of big-boob-related trauma by the flat-chested girl of his dreams, Noboru is ready to throw himself into their life together…but relationships are tough—especially when your girlfriend is a succubus! With an unstoppable army of voluptuous demons poised to enslave humankind—only boobless Melulu and virginal Noboru can save the world!!

Volume 2 of the Devil Ecstasy manga series by Shuzo Oshimi.