A four-poster bed for two.
2 oak steps
2 oak stairs
2 oak boards
6 blocks red wool
8 blocks white wool
First you dig a 2x2 block hole in the wall as shown in the picture.
In front of it you put two blocks of wool and two beds, next to them oak blocks and oak stairs.
In the hole put two steps at the bottom and two bookshelves at the top. Next to the bed you build fences
Then you build a roof out of wool, and the four-poster bed is ready...