
Do you mean a story that has a trangender person that hasn't got gender reassignment surgery? In that case i actually cannot think of anyone...sorry, i mean there must be a handful of manhwas with trans protagonist, but i don't know one with smut in it.
Or maybe you meant one like in a genderbender where a character changes sex on and off again or in a omegaverse where regardless of sex an alpha has a pp?
If it's the former case, 'fucked by my bestfriend (yaoi)" is a famous one. I also highly recommend https://www.mangago.zone/read-manga/kobayashi_senpai_wa_on_nanoko_de_shitai/ pretty artsyle and the mc identifies as a male but there's straight smut scenes (i don't wanna give spoilers)
If it'd the latter, at the top of my head i thought 'love is a fantasy!- the queen' (fl is an alpha and there's a love triangle)
But i cannot think of a manhwa/ga where a character self identifies themself of one gender but has the opposite's sex genitelia and that's not defined as a transexual person
Or there's also 'boy meets girl'. Mc is male and one day wakes up with his pp magically gone and in its place theres a meow meow
Sorry if this was not helpful!
I just wanna know are there any mangas/hwa/huas that have like ftm or mtf bc I really wanna read one where it's like a bl/gl and a straight one where like the Male character has a puss but is still Male and is dating a girl or boy idc or where a girl has a pp and is dating a girl or boy bc they seem so interesting and I really wanna read one like that ╥﹏╥