[krko]

Originally Posted by rulfo

Spoiler for Nibutani speculation:

It seems like some people are saying that she wrote the book Sanae was reading.

I dunno how to read Japanese so can't really say much. If this is true then color me hyped! I can see her trying to save Yuuta from regressing to Chunibyou.

I'm inclined to agree with this. I think she's joining to hide her chuunibyo past and Rikka to shut up about "Mori Summer". All that winking she's doing is just her hiding her motivation.