How to make privacy tent/curtain for twin sized bed?

I'm on the Disney College Program and I have 5 flatmates and I'm sharing a room with 2 other girls. I need some privacy. The girl who got the bottom bunk was able to put up blankets around to make her own little place and the girl on the top bunk is pretty hidden away. My bed is the twin sized bed next to the window in the corner. The bed is in the corner with the head of the bed against one wall and the left side against the other wall.

I can usually figure out a lot of DIY's but this one is tricky. I can't put any holes in the walls. At. All. So no screws, nothing that is going to leave permanent marks or mess up the paint.

I looked in to those prop up bed tent tings but the ones geared for dorm rooms are $120. Nope. Not happening. I even thought about getting one of the pop up bed tents for kids. I don't care about the design so long as there was a way I could have some privacy. I get mixed reviews on whether someone of about 5'2" could sleep in one.

I was thinking I could put the huge command hooks (already looked into it, these are approved by housing) in sideways on the two walls, add some type of dowel/rod to the bottom right of the bed. From there I could put some type of cord, or dowel, in between and hand hang some type of dark fabric from it. Thoughts????

Picture of How to make privacy tent/curtain for twin sized bed?

Go to your favourite hardware or camping store and bet extendable poles.
They are used for tarps and similar.
Put a piece of wood or similar on the top pin so it won't damage the ceiling and extend the pole so you have temporary mounting pole.
Add a blanket, tarp or whatever and you are hidden away.
If there is nothing on the walls to mount your blanket you will need 3 poles.

Brilliant idea.