*pls send help*

I can only think of "Otoshiana ni Hamerarete"
( http://www.mangago.me/read-manga/otoshiana_ni_hamerarete/)
Although the crossdresser blackmails/rapes the other, fair warning

http://www.mangago.me/read-manga/otoshiana_ni_hamerarete/
Check the authors other works theres alota cross dressing ones

http://www.mangago.me/read-manga/hana_ni_kuchizuke/
This one has a sequel

Hanayome wa juunanasai —the uke was forced to live as a girl by his mom

http://www.mangago.me/read-manga/nise_x_koi_boyfriend/
This was the first that came to mind