Jeong Wooyeol (M) is an illustrator and cartoonist who is good at flipping dogs and killing plants. He started his career as a major in Korean literature, drawing political cartoons in university newspapers, and has been meeting readers since 2004 through his character "Old Dog." Old Dog is the author's pen name and reflects his self-portrait, although many fans refer to him as Snoopy in Korea. He is an influencer with more than 20,000 Instagram followers and has been selected as one of "Korea's 50 most powerful creative artists" (hosted by Adobe Korea).