You could use a book cover or a sleeve to hide the light novel covers. It's simple and works well.
Well, you might consider wrapping them in plain paper or fabric. Another option is to place them behind other books on the shelf so they're not immediately visible.
You could try using a book sleeve or a wrapper. That way, the cover is concealed.
You can put it in a private folder or use encryption software to protect it.
You could keep it to yourself and not tell anyone. Simple but it works sometimes.
To hide a story, you might consider disguising it as something else. For example, presenting it as a fictional tale within a larger collection of unrelated stories. Or perhaps changing key details to make it less recognizable. Another option is to only reveal parts of it at different times to different people, so no one has the complete picture.
You could use password-protected folders or apps. That way, only those with the password can access the stories.
Well, you might consider using a hidden partition on your device or using specialized software that offers stealth mode for storing and accessing your story. Also, changing the file extension or compressing it with a password can add an extra layer of protection.
To hide clues well in a mystery novel, you might want to use misdirection. Make the reader think one thing is important when it's not, and vice versa. And place clues in unexpected places, like a passing comment or a seemingly insignificant object description.
You can make the dialogue less prominent by using smaller font size or a less bold color.
You could try adjusting your privacy settings on the relevant social media platform. Usually, there's an option to hide specific posts or stories from certain friends.