Big Problem with the X-Ray Stickers

When Nobita uses an X-Ray Sticker on Dekisugi's notebooks to copy his homework, he accidentally views an exchange diary between him and Shizuka where they both criticize Nobita's dependency on Shizuka. Infuriated, Nobita writes some insulting things on the monitor which end up showing on the actual notebook and now he has to find a way to erase the text before Shizuka and Dekisugi find out what he did.