You can achieve this with the built in functionality of Joomla.
Create a Category Blog Menu Item and deactivate title under the options tab.
While creating an article, write first your fake title and maybe a short intro text.
Then use the "read more" button on the bottom of the editor to insert the read more button (displayed as line in the editor).
There are a couple of alternatives.
You can add styles or a style sheet into the administrator using the technique here:
How to add custom JS/CSS file, without modifying the template (from extension)?
Using $app->isClient('administrator') will allow you to add css just to the administrator. If you really want to load only on your page you can ...
Administrator menu items can be added to manifest file's <administration> section:
Although I accepted Neil's answer, I found an easier method to do this. But my method may not appeal to many since it requires changing XML files of default Joomla installation. Perhaps there's a way to write a custom XML to override the settings selectively in the default XML.
Article form settings are available in these files: