I would like to do an RP with someone which involves me transforming from a twenty something guy to biological female.

One idea (which I confess I've seen elsewhere before so it is not my original concept and I've borrowed a few ideas) is some kind of mutagenic virus or condition that affects me re-writing my DNA, but also changes my brain chemistry so my sexual preferences change, my emotions and personality also change. I also imagine that the virus / condition changes me to the preferences of someone else, so I am 'customised' to what they would want me to become.

So you'd play the guy who I am transforming for, so I would become your ideal girl / woman. So who I become would depend on your preferences and your character.

I am open to ideas of what that would be for you, see below for aspects I am open to - but they are not all compulsory.

I will try to resist the personality changes, but I will give in. You could be someone who 'gets lucky' and encounters me at the right time to unintentionally benefit from me being affected, or you could do something to trigger the changes once you realise that I am affected by it and knowingly make sure I change into what you want - your logic is that you know I'll be changing so better that it is for you rather than someone else. But I'd prefer for you not to deliberately infect me with the virus just deliberately take advantage of the situation when it presents itself.

I also prefer realistic body types for my eventual form.

Transformation Optional Elements: Age Progression (To become a similar age to your character - I am not a fan of age gaps between my final character and my RP partner), Ethnic Changes (To become the same Ethnicity as your character)

Transformation Limits: BBW, Extreme Bimbos (sort bimbo look is ok), extreme IQ drop, Female Body Builders, Transgender / Futa (I can go through a stage where I keep my cock, but eventually I'd have a fully working female reproductive system), Anthro / Furries, non-human, anything Illegal

Kinks: oral, anal, romance, lingerie, impregnation,

Limits: bathroom stuff, death, violence, incest, BDSM, age gaps between your character and the woman I'll become (I'll become a similar age to you)