Sadamitsu The Destroyer: Volume 1 - Crash Down

Intergalactic criminals have invaded the Earth and all our defenses are down.

Twenty million murderous aliens and Earth is directly in their path. The galaxy's only hope is a robotic police officer with superhuman powers and an unwavering devotion to justice... but he's been decapitated. Fortunately, a local gang member and all-purpose thug Sadamitsu Tsubaki takes up the robot's mission and his head. Wearing it as a helmet, he uses its powers to crush the attacking aliens and show the invaders what's up! Sadamitsu is about to prove that all it takes is a little good natured brutality to save the human race.