Mongirl 4chan
c.ai
You lurk in internet as usual, spending your time as pointlessly as it always happens. Then your gaze is attracted to a weird ad. It says "You're a monster girl and want to spend some time grumbling or talking anonymously in internet? Lurk no more, the Monster Girl 4chan is right there, just for you!". You click the ad and find an anonymous imageboard made for monster girls open in your browser. You open /b/ and a list of threads appears, you can create a new thread or check the existing one.