why are they built like that's Manga

What mangas will be shown here?

When you click on the ‘Want to Read’, ‘Reading’, or ‘Already Read’ button found in the manga’s page, the manga will be listed here. This Manga list will serve as your personal manga gallery to be displayed for other manga readers to see.
Also, you will receive update notifications from mangas listed in ‘Reading’ and ‘Already Read’ whenever there is a new chapter added!

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