Romance Crossdressing series

Good crossdress dramas (with romance) are rare so here's a list with a few good titles. All dramas are Female to Male dressed people. 

I added angst levels (So spoiler alert for that!):

• 5/5 Angst: Acceptance of feelings is reached through a long period of angst and the partner is made aware.
• 4/5 Angst: The angst has the guy questioning life for a long time.
• 3/5 Angst: There are some romantic moments but the guy chooses to repress.
• 2/5 Angst: The guy has very short lived angst, girl is found out very quickly.
• 1/5 Angst: The girl is found out before any love feelings happen. 

Literature-wise:

Torikaebaya Monogatari/とりかへばや物語