After clearing the game's savedata folder, I did run into the DVD verification.
I've applied a small patch to the main executable to bypass the check—give it a try. link (SiglusEngine.exe)
If you haven't applied the update patch yet, you can download DL_crack.7z to use as the crack.
Update:
crack
(read readme.txt first)
You can try applying the update patch manually.
Copy the GameData contents from the patch into the game's data folder; the patch includes the main game executable which is not protected by PlayDRM.
If you wish to purchase the digital version (DL), please follow these steps:
Set up a Japan VPN and register a DMM account.
Visit the game page to buy the game.
If you do not have a Japanese credit card (such as JCB), you may need to use DMM Points to complete the transaction. You can top up...