keep this a secret from your mother manga

It really varies. Some manga have characters who can keep secrets well, while in others, secrets are spilled easily. It all depends on the story's context and the personalities of the characters.

I'm not sure. It depends on the specific manga you're referring to. There could be various plot developments and character relationships that determine who it is.

You can create a spreadsheet. List the titles, authors, volumes you have, and any notes about their condition or where you got them.

Simple. Just don't tell anyone. Keep your mouth shut and don't be tempted to share the secret, no matter how juicy it seems.

To keep a secret, I first try to forget about it myself. I don't let it linger in my mind too much so that I'm not tempted to share it. Also, I avoid situations where the secret might accidentally slip out, like when I'm drunk or really angry.

It depends on the specific manga. Some might have such a plot element, while others might not.

Yes, I do. The story and characters are very engaging and relatable.

Perhaps the secret is that Lucy has a unique magical item that is very powerful and dangerous. Natsu keeps it a secret because he doesn't want other mages in Fairy Tail to get greedy or misuse it. This item could be something that was passed down in Lucy's family and she doesn't fully understand its potential yet.

You can store your manga between heavy books. That usually helps keep them flat.

It depends on the specific plot and characters. Sometimes, secrets are well-kept, but in other cases, they get revealed unexpectedly.