Midnight Stage

Mayonaka Stage is a recurring term in Persona 4: Dancing All Night.

The Urban Legend
In the recent trailer, Kanami watch a website at midnight, but suddenly she disappear and ended up on the other side after watching the whole video.

"Hey, do you know about that rumor? They say that if you go on a certain website at midnight, a strange video will start to play on its own. Rumor has it that at first, you can't really tell what’s going on in it, but if you watch it until the very end, you'll get taken to the other side and never wake up again."

Profile
The Mayonaka Stage is similar to Midnight Channel except instead of fighting the Shadows, they have to defeat them in a dance battle in order to move to the next stage.