Koko Yumemi -

While it's possible you're looking for a review of one of these, I am answering for the most likely interpretation: , a VTuber whose "reviews" are a staple part of her community's humor. Interesting Review: Koko D. Nuts (VTuber)

: Her community often describes the stream as "the most prominent example of actual brainrot". koko yumemi

Koko Debut, Tome 10 - Reviews - The StoryGraph While it's possible you're looking for a review