Mottai Night Land is a song by a Japanese band called Babymetal. The song is about a magical place called "Mottai Night Land" where there are no rules and everyone can be themselves without being judged.
Imagine you have a special magical land where you can do anything you want without any grown-ups telling you what to do. You can jump as high as you want, sing as loud as you can, and dance as crazy as you can.
In Mottai Night Land, everything is bright and colorful, and there are cute and fun characters to play with. You can wear whatever you want, and there are no rules about how to behave.
But remember, Mottai Night Land is just a pretend place, and we should always try to be ourselves and have fun in the real world too!