User blog comment:Dragon´s Blade/World Coexistence Alliance/@comment-24376783-20141105232206/@comment-24376783-20141106005629

KOS-MOS: "We looked at all the camera angles and found a blindspot where her bookshelf was. We examined the bookself further and found the back part on the third shelf down cut out with a cover over it. Once we removed the cover, we found a secret compartment in the wall behind it. Inside was the notebook."