To use these posters and prints, you can simply hang them on your wall with tape or a frame. Make sure the wall surface is clean and dry. When it comes to maintenance, avoid exposing them to direct sunlight for a long time as it may fade the colors. Also, keep them away from moisture. If they get a little dirty, you can gently wipe them with a dry cloth. That's all there is to it and enjoy your Neon Devil Girl posters and prints!