From a DLC.
8-bit Miku. :3

That goddamn Sphinx. -_- My lack of Japanese makes it even harder.
Thankfully, there's a "cheat sheet" out there. :3:
http://yue801.blog45.fc2.com/blog-ent...

Ending 1 is with the standard ol' clear item.
Ending 2 is from getting all of the notes and watering the pot for some other clear item. I found out late. If I had known, I would've collected all the notes.

Sphinx section is abridged because I was using the "cheat sheet".