Laundry/Pantry Closet. If you are building a little larger tiny home, and will have room for a laundry pair or a stacked w/d or a combo unit in one, then I could see this as way to make the most of the storage, and to be able to close the doors against the noise when in use .
Wow, this looks just like my first student room! i had a little attic for my bed just like this. April Anson's 120 sf modified Tumbleweed