This is the opening page of Yaza's "Flan Explosion" book.

I feel the pixiv tags are worth translating to:

• What's going on...
• Rape eyes
• You're not even supposed to be humans
• Me, as I am today, can not comprehend this
• The author is ill
• Touhou
• There's a chewing sound effect even though it's liquid
• Entire screen full of crazy
• Aka no hiroba (Name of the event where the book was released)
• I can just barely comprehend the second panel

This gives some Pageratta's nonsense atmosphere.