This manga is just a bunch of epilogues and a few one shots continuing Sensei's other series. I would recommend starting with the original series first before going to this sequel.
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.
Ore To Joushi No Kakushikoto