You become a Woman.

A huge astral body, floated in the void.

You had an innate sense that this astral body was the worlds representation of you.

It's features were in flux, slowly morphing between various variations. One moment it was huge and muscular, the next lithe and refined with a hint of femininity.

What you currently were wasn't really clear, it was in a superposition of many states as as the rules began taking effect.

This was entirely unexpected, the rulebook had never felt like this before.

"Old-rule: I am a high 8/10 physically by university standards, but that's only with a lot of work to achieve it." #Will have me looking very nice but will need to put some work in gym, clothes is how I'm imagining it.

Reality seemed to churn, contemplating the rule, contemplating you.

Through your connection to the rulebook, you could feel it's consideration of the facts of this new world.

1. Half of your new class were going to be Women, the clear majority of any gender. Therefore any new student was most likely to be female, you were going to be a new student.
2. Perhaps the most important consideration was that you were going to be a potential 8/10 by University standards. For an average score of 8/10 you need a lot of the students to find you attractive. Women find women sexually attractive. Men find women sexually attractive. FemBoys find Women sexually attractive and Futanari certainly find Women sexually attractive. Women just had a greater level of attractiveness, Men struggled to have that same level of coverage among the student body.
3. The rulebook doesn't change things without a reason. You were currently a man and that provided a certain level of resistance against any change to that.

As the rule took hold, you felt your astral body shift and transform, the very fabric of your being realigning to fit this new worlds standard of physical attractiveness.

It's height decreasing, giving you a more petite frame, and the majority of your muscle mass faded away, replaced by a softer, more feminine physique. Your shoulders narrowed, emphasizing the delicate curve of your neck and shoulders, while your hips necessarily widened, to accommodate your large ass. creating a captivating hourglass silhouette.

But the most striking change was the emergence of breasts.

The final nail if the coffin, was your dick and balls disappeared, being replaced with a pleasantly plump pussy.

You'd gone from a pretty average looking man to the silhouette a very attractive woman.

The crushing absolute truth of the world, you were and are a Woman.