ATEEZ's new song teaser is crazy, I'm looking forward to it

What is this 'IN YOUR FANTASY' teaser that has been released?
The video's atmosphere and visuals are no joke. I'm really curious to see if a new song will be released this time!

It hasn't been that long since I started Lemon Drop, what is this?
I'm even more excited because I think ATEEZ's unique immersive worldview has been well captured.