It is possible that if you are familiar with a lot of anime cartoons, you are familiar with this anime cartoon as well. The blue exorcist is an appealing anime cartoon that a lot of people have watched over the years. See the many characters that you have grown to love as you watched those series in their smiling faces with an establishment just seen a little bit in the background. If you have never seen the series but you find this background appealing because of its name or how it looks, this is completely fine as well. As long as you appreciate it, it's okay.