When I notice it, I often nap as it is, but each online shopping site sells the item "POP Cube TV Cushion" that is perfect for such a self-degrading life.
This product is a cube-shaped cushion with holes on each side of the cube. Even if you use it as a pillow, it will not block your ears and will catch the sound of the TV properly. The contents are soft beads, which is convenient for taking a nap with a kotatsu or taking a break during work.
It can also be used as a sitting chair. One side is about 19 cm, and the price is 1,480 yen (excluding tax).
By the way, for those who are already in a relationship that is so inseparable that they want to marry a kotatsu, we recommend the low sofa and cushions for the kotatsu that appeared last year and became a hot topic. It fully fills the coldness of your back when you are sitting on a kotatsu and the feelings you want to get from something. A wonderful item that makes me sleepy just by looking at it, and I feel like I'm about to buy it ...
If you build your own perfect castle, don't forget the "Kotatsu side pocket" that is indispensable for siege!