Digital Toast - A Ei

This is not a simple bookmark but an "A Ei" (pronounced (h)Ey Eye) device, a genius piece of tech, able to retrofit old, boring books with the capabilities of personalized, targeted advertisement.
You are a petty ghost trapped in it with only one goal: to make a poor reader who mistakenly picked up this bookmark absolutely miserable by ruining their book.

Not sure if it's really NSFW, but it has a mention of some sex stuff in one of the tables.

I have created this for the TTRPG Bookmark Jam.