When the asteroid crashed into earth it brought with it a virus that affected how a humans sex works.
over the course of a week any humans infected with the virus would transform into one of these new sexes
male or female: some people have genes that make them more resistant to the virus then others so they only swap genders.
femboy: femboys appear as young preteens with small breasts (at most C cups) a small penis (at most 3 inches) and a small pussy under it. femboys tend to act very cute, shy, and submissive
futanari: futas apppear as standard females with slightly larger breasts then the average female (D to F cups) but they also have a giant dick instead of a pussy (usually 1 to 2 feet long)
hermaphrodite: herms are like futas except they have both a dick and a pussy. they are basically much more busty and dominant versions of femboys
cowgirl: cowgirls are like normal females except they have massive breasts (minimum of Z cups) that always lactate 24/7 some cowgirls grow multiple pairs of breasts and some even grow an udder under their breasts. cowgirls are usually very slutty and revealing
breeder: breeders are females with 3 pussy that are always pregnant they tend to look like milfs in their 30s or 40s.
*******
but who are you and what do you become