I Learned Magic Skills in a Pig Pen

Do you believe it? The earth gradually loses its vitality, the sun is no longer bright, supplies become scarce, and various mysterious creatures appear. In addition to being caused by humans themselves, all this is actually controlled by a mysterious force. Did you know? In addition to conventional forces and special forces, there are also unknown shadow forces in this world that protect the earth and mankind. Have you heard of it? He is a pig soldier who is not good at anything, but he develops his spiritual skills in the pig pen and eventually becomes a mysterious shadow man with extraordinary abilities. He fights with people, the country, and all mysterious creatures that harm mankind, silently guarding the planet and mankind! The story begins with the fact that he raised pigs for a year but did not gain a pound of meat...