I'm Really Three-dimensional

Why did Shiyu of Kasumigaoka send out a gorgeous rebellion to the original author?
Why was Yukino Yukino's minister of service robbed and even his lines robbed?
Why did Kaguya Shinomiya slash the head of an unknown creature with a fire axe?
Behind all of this, is the distortion of human nature or the decline of morality?
Is it the explosion of the three-dimensional or the helplessness of the Two-dimensional?
Please pay attention to [Hedgehog Cat] annual giant presentation "I am really three-dimensional"
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In short, it's a spoiler, admitting that you are a traveler and have a system!