There's a oneshot at the beginning and afterwards there are more in-depth chapters that explain everything. (honestly I liked the oneshot part the best :P)
You may feel your favorite manga should be gathered together into distinct categories for your own reference and, now, you can do this with a LIST. After you've created your list or lists, you can proudly recommend them to other manga fans to showcase and share your taste in manga.
Rasen No Kioku