[Shikijin]

Originally Posted by MrFalcon

In Nisemonogatari, Nadeko had a special closet in her room that she wouldn't let Araragi look in. Had a lot of locks and bolts on it, and Nadeko creepily said she wouldn't forgive anyone for looking inside, not even Araragi. I was thinking this might be explained in the latest arc, but it wasn't. Did the light novel ever explain what was in Nadeko's closet?

Yes, in Koimonogatari.