The Palace of Thoughts

About
The Palace of Thoughts (思考の宮殿 , Shikō no Kyūden) is a palace inside Thought Realm that thoughts mindlessly roam around. The palace is currently rotten and vengeful thoughts are fleeting around. It used to be Natsune Akagawa's palace until she went to the Moon Inside The Thought Realm long ago.

The Incident of The Strange Moon
On stage 6, Sorashi Daisansekai comes back to change the heroines' route.

Chigawajin's Nightmare
On Midoriyama route, Chigawajin gets attacked by Akabana and Sorashi Daisansekai once more here.

Main Hall
The main hall of The Palace of Thoughts is a hexagon-shaped huge hall that literally every junk and thought floats around to be turned into voice.

Corridor of Vengeful Thoughts
This corridor is below every hall because it carries the worst thoughts one could ever create. The heroines encounter Akabana here.