紙記憶 / Paper Memory

You can rip it whenever you see it. You shouldn’t worry about the tear or the dog-ear in any page. In addition,
you don’t need to paste the colored tags in pages for marking. The edge of each page has special design which looks like the stairs.
It is specifically for people to rip or to bend in order to mark in the book and reminder you the latest page and the points.
The special design of the bookmark can let the every readers tear it. After you tear or bend it, the edge of the book is still new.