This is a channel created by a person who likes sleeping and fantasizing, and who suddenly wanted to sleep in Mugen no Sekai.
I hope it will help you to have a good dream.
The sound source is the original one, and the background images are selected from copyright-free sites and partially processed to fit the image.
copyright-free sites for background images (example)
stock.adobe.com/
pixabay.com/
www.pexels.com/