A looong time ago, I read this BL manga where the MC's mom never told the MC's dad she was pregnant (I think MC's mom was a mistress or something) and raised him as a girl because she didn't want her son to be caught up in the dad's family politics, but at the start of the manga is after the mom has passed away and the dad has sent a family lawyer to MC. I don't really remember what else happens, but I'm pretty sure the lawyer is MC's love interest, and I cannot remember the title for the life of me! Any help would be appreciated.

is it Hanamai Koeda de Aimashou?