I Really Didn't Want to Be an Entertainment Boss

Zhang Fan, who came to the parallel world, originally wanted to make money as a copywriter, but he didn't expect that his vest, Mr. Dafan, would become popular. Then... Write a random song and it will be played in every street and alley; write a random book and the whole Internet will pick up the outline and follow suit; casually created art works will also be sold for sky-high prices...