adult animation, implant, military, lawn mower, sex scene

I watched this animation about ten years ago. I'm looking for the title. I don't remember the full plot, but I remember the story being about a man who was fighting some sort of government mandated implantable device. He was being hunted by the military??? (I think it was called "Happy corporation" or something along those lines). There was a scene with him mowing the lawn, and I believe the grass was screaming?? There was a sex scene too, if I remember correctly. Any help would be appreciated.