Where do I order it from
Depends on your language! You can find the english version on Amazon, there's 12 volumes so far and it's an omnibus 2 in 1 edition (Vol 1-2, 3-4, 5-6, etc) so it costs about $20-$25 per volume. For other languages, if it's translated, you might find them on Amazon still, or you can try and order them on websites of bookshops in your country. I personally own the first 7 volumes in french (the price per volume was 8€, so better deal), but it was dropped so I switched to the english omnibus edition. Overall you need money to spare LOL. If you want I can drop the link to all the chapters from vol 1 to 12!
I would appreciate it if you can drop the link and I'm definitely going to buy it cuz I want to reread it.
https://mangafire.to/manga/dont-say-mysteryy.0nz3 here! You can pick it up at chapter 7, all the chapters prior are already uploaded on mangago
I ordered the volumes fuck this shit! I never felt the urge to own a manga so badly