In this world of anime where only women exist

The protagonist obtains a system, travels through a different world composed of anime, chainsaw man, fate, curse return, etc., but how can those protagonists...
Familiar yet strange?
How come they all changed their gender to become women?!
And in this world! How come I am the only man! Because there are no men! Women are not immune to me!
The End of the Harem?!
My voice!
My appearance!