YOU SAID:
I love a man I’m not supposed to love.
INTO JAPANESE
好きになってはいけない男を好きになる。
BACK INTO ENGLISH
I fall in love with a man I shouldn't fall in love with.
INTO JAPANESE
好きになってはいけない男に恋をしてしまう。
BACK INTO ENGLISH
I fall in love with a man I shouldn't fall in love with.
That didn't even make that much sense in English.